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We've sex been told that men think about you-know-what far too often — every seven seconds, by some accounts. Most of us have entertained this idea for long enough to be sceptical. However, rather than merely wonder about whether this is true, stop for a moment to consider how you could — or could not — prove it. If we believe the stats, thinking about sex every seven seconds adds up to times an hour. Or approximately 7, times during each waking day. Is that a lot?

The scientific attempt to measure thoughts is known to psychologists as " experience sampling ". It sexx interrupting people as they go about their daily lives and asking them to record the thoughts they are having right at that moment, in that place. Terri Fisher and her research team at Ohio State University did this using 'clickers'. Sex gave these to college students, divided into three groups, and asked them to press and record each time they thought about sex, or food, or sleep.

33 you were asked to record every time you thought about sex during the day, how many times sex you think you would admit to it? Using this method they found that the average man in their study had 19 thoughts about sex a day. This was more than the women in their study — who had about 10 thoughts a day. However, the men also had more thoughts about food and sleep, suggesting perhaps that men are more prone to indulgent sex in general.

Sex they are more likely to decide to count any vague feeling as a thought. Or some combination of both. The interesting thing about sex study was the large variation in number of thoughts.

Some people said they thought about sex only once per day, whereas the top respondent recorded clickswhich is a sexual thought about every two minutes. However, the big confounding factor with this sex is "ironic processes", more commonly known as the " white bear problem ". If you want to have cruel fun with a child tell them to put their hand in their air and only put it down when they've stopped thinking about a nna bear.

Once you start thinking about something, trying to forget it just brings it back to mind. This is exactly the circumstances the participants in Fisher's study found themselves in. They were given a clicker by the researchers and asked to record when they thought about sex or food or sleep. Imagine them walking away from the psychology department, holding the clicker sec their hand, trying hard not to think about sex all the time, yet also trying hard to sex to press the clicker every time they did think about it.

My bet is that the poor man who clicked times was as sex a victim of the experimental design as he was of his impulses. Always on my mind Another approach, used by Wilhelm Hoffman and colleaguesinvolved issuing German adult volunteers with smartphones, which sez set to notify them seven times a day at random intervals for a week.

They were asked to record what featured in their most recent thoughts when they received the random alert, the idea being that putting the responsibility for remembering onto a device left participants' minds more free to wander. The results aren't directly comparable to the Fisher study, as the most anyone nx record thinking about sex was seven times a day.

But what is clear is that people thought about it far less often than the seven-second myth suggests. The real shock from Hoffman's study is the relative unimportance sez sex in the participants' thoughts. People said they thought more about food, sleep, personal hygiene, social contact, time off, and until about 5pm coffee. Watching TV, checking email and other forms of media use also won out over sex for the entire day.

In fact, sex only became a predominant thought towards the end of the day around midnightand even then it was firmly in second place, behind sleep. Sleep is the thing the average man thinks about most towards the end of the night, sfx Getty Images. Hoffman's method is also contaminated by a white bear effect, though, because participants knew at some point during the day they'd be asked to record what they had been thinking about.

This could lead to overestimating some thoughts. Alternately, people may have felt embarrassed about admitting to having sex thoughts throughout the day, and therefore underreported it. So, although we can confidently dismiss the story that the average male thinks about sex every seven seconds, we can't know with much certainty what the true frequency actually is. Probably it varies wildly between people, and within the same person depending on their circumstances, and this is further confounded by the fact that any efforts to measure the number of someone's thoughts risks changing those thoughts.

Thoughts aren't like distances we can measure in centimetres, metres and kilometres. So what constitutes a thought, anyway? How big does it need to be to count? Have you had none, one or many while naa this?

Plenty of things to think about! If you have an everyday psychological phenomenon you'd like to see written about in this column please get in touch tomstafford or ideas idiolect. Read more. Open share tools. Like us on Facebook. Follow us on Twitter. Follow us on Instagram. Sign up to our newsletter. Around the bbc.

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Feminism is said to be the movement to end women's oppression hooks In so doing, they distinguished sex being female or male from gender being a woman or ses manalthough most ordinary language users appear to treat the two interchangeably. More recently this distinction has come under sustained attack and many view it naa with at least some suspicion. This sex outlines and discusses distinctly feminist debates on sex and gender.

Sketching out some feminist history of the terms provides a helpful starting point. Most people ordinarily seem to think that sex and gender are coextensive: women are human females, men are human males. The main feminist motivation for making this distinction was to sx biological determinism or the view that biology is destiny.

A typical example of a biological determinist view is that of Geddes and Thompson who, inargued that social, psychological and behavioural traits were caused by metabolic state. It would be inappropriate to grant women political rights, as they are simply not suited to have those rights; it would also be futile sxe women due to their biology sx simply not be interested in exercising their political rights.

To counter this kind of biological determinism, feminists have argued that behavioural and psychological differences have social, rather than biological, causes. Commonly observed behavioural traits associated with women and men, then, are not caused by anatomy or chromosomes. Rather, they are culturally learned or acquired. Although biological determinism of the kind endorsed by Geddes and Thompson is nowadays uncommon, the idea that behavioural and psychological differences sex women and men have biological causes has not disappeared.

In the s, sex differences were used to argue that women should not become ses pilots since they will be hormonally unstable once a month and, therefore, unable to perform their duties as well as men Rogers More recently, differences in male and female eex have zex said to explain behavioural differences; in particular, the anatomy of corpus callosum, a bundle of nerves that connects the right and left cerebral hemispheres, is thought to be responsible for various psychological and behavioural differences.

Anne Fausto-Sterling has questioned the idea that differences in corpus callosums cause behavioural and psychological differences. First, the corpus callosum is a highly variable piece of anatomy; as a result, generalisations about its size, shape and thickness that hold for women and men in general should be viewed with ssx.

Second, differences in adult human corpus callosums are not naa in infants; this may suggest that physical brain differences actually develop as responses to differential treatment. Third, given that visual-spatial skills like map reading can be improved by practice, even if women and men's corpus callosums differ, this does not make the resulting behavioural differences immutable.

Zex b, chapter 5. Psychologists writing on transsexuality were the first to employ gender terminology in this sense.

Although by and large a person's sex and ma complemented each other, separating out these terms seemed to make theoretical sense nq Stoller to explain the phenomenon nx transsexuality: transsexuals' sex and gender simply don't match. Along with psychologists like Stoller, feminists found it ses to distinguish ba and gender. This enabled them to argue that many differences between women and men were socially produced and, therefore, changeable.

Rubin's thought was that although biological differences are fixed, gender differences are the oppressive results of social interventions that dictate how women and men should behave. However, since gender is social, it is thought to sexx mutable and alterable by political and social reform that would ultimately bring an end to women's subordination.

In some earlier interpretations, like Rubin's, sex and gender were thought to complement one another. That is, according to this interpretation, all humans are either male or female; their sex is fixed. But cultures interpret sexed bodies differently and project different norms on those bodies thereby creating feminine and masculine persons.

Distinguishing sex ja gender, however, also enables the two to come apart: they are separable in that one can be sexed male and yet be gendered a woman, or vice versa Haslanger b; Stoljar So, this group of feminist arguments against biological determinism suggested that gender differences result from cultural practices ha social expectations.

Nowadays it is more common to denote sec by saying that gender is socially constructed. But which social practices construct gender, what social construction is and what being sez a certain gender amounts to are major feminist controversies. There is no consensus on these issues. See the entry on intersections between analytic and continental feminism for more on different ways to understand gender. One way to interpret Beauvoir's claim that one is not born but rather becomes a woman is to take it as a claim about gender socialisation: females become women through a process whereby they acquire feminine traits and learn feminine behaviour.

Masculinity and femininity are thought to be products of nurture or how individuals nq brought up. They are causally constructed Haslanger98 : social forces either have a causal role in bringing gendered individuals into existence or to some substantial sense shape the way we are qua women and men. And the mechanism of construction sex social learning. Feminine and masculine gender-norms, however, are problematic in that gendered behaviour conveniently fits with and reinforces women's subordination so that women are socialised into subordinate social roles: they learn to be passive, ignorant, docile, emotional ssex for men Millett That is, feminists should aim to diminish the influence of socialisation.

Social learning 33 hold that a huge array of different influences socialise us as women and men. This being sex case, it is extremely difficult to counter gender socialisation. For instance, parents often unconsciously treat their female and male children differently.

When parents have been ns to describe their hour old infants, they have done so using gender-stereotypic language: boys are describes as strong, alert and coordinated and girls as tiny, soft and delicate. Xex socialisation is more overt: children are often dressed in gender stereotypical clothes and colours boys are dressed in blue, girls in pink and parents tend to buy their children gender stereotypical toys. According to social learning theorists, children are also influenced by what they observe in the world ssex them.

This, again, makes countering gender socialisation difficult. For one, children's books have portrayed males and females in blatantly stereotypical ways: for instance, males as adventurers and leaders, and females as helpers and sex.

Some publishers have attempted an alternative approach by making their characters, for instance, gender-neutral animals or genderless imaginary creatures like TV's Teletubbies. However, parents reading books with gender-neutral or genderless characters often undermine the publishers' efforts by reading them to their children in ways that depict the characters as either feminine or masculine.

According nx Renzetti and Curran, parents labelled the overwhelming majority of gender-neutral characters masculine whereas those characters that fit feminine gender stereotypes for instance, by being helpful and caring were labelled feminine Socialising influences like these are still thought to send implicit messages regarding how females and males should act and are expected to act shaping us into feminine and masculine persons.

Instead, she holds that gender is a matter of having feminine and masculine personalities that develop in early infancy as responses to prevalent parenting practices. In particular, gendered personalities develop because women tend to be the primary caretakers of small children.

Chodorow holds that because mothers or other prominent females tend to care for infants, infant male and female psychic development differs. Crudely put: the mother-daughter relationship differs from the mother-son relationship because mothers are more likely to identify with their daughters than their sons.

This unconsciously prompts the mother to encourage her son to psychologically individuate himself from her thereby prompting him to develop well defined and rigid ego boundaries. However, the mother unconsciously discourages the daughter from individuating herself thereby prompting the daughter to develop flexible and blurry ego boundaries. Childhood gender socialisation further builds on and reinforces these unconsciously developed ego boundaries finally producing srx and masculine persons sex, — This perspective has its roots in Freudian psychoanalytic theory, although Chodorow's approach differs wex many ways from Freud's.

Gendered personalities are supposedly manifested in common gender stereotypical behaviour. Take emotional esx. Women are stereotypically more emotional and emotionally dependent upon others around them, supposedly finding it difficult to distinguish their own interests and wellbeing from the interests and wellbeing of their children and partners.

This is said to be because of their blurry and ses confused ego boundaries: women find it hard to distinguish their ssex needs from the needs of those around them because they cannot sufficiently individuate themselves from those close to them. By contrast, men are stereotypically emotionally detached, preferring a career where dispassionate and distanced thinking are virtues.

These traits are said to result from men's well-defined ego boundaries that enable them to prioritise their own needs and interests sometimes at the expense of others' needs and interests.

Chodorow thinks that these gender differences should and can be changed. Feminine and masculine personalities play a crucial role in women's oppression since they make females overly attentive to the needs of others and males emotionally deficient. In order to correct the situation, both male and female parents should be equally involved in parenting Chodorow This would help in ensuring that children develop sufficiently individuated senses of selves without becoming overly detached, which in turn helps to eradicate common gender stereotypical behaviours.

Catharine MacKinnon develops her theory of gender as a theory of sexuality. Very roughly: the social meaning of sex gender is created by sexual objectification of women whereby women are viewed and treated as objects for satisfying men's desires MacKinnon For MacKinnon, gender is constitutively constructed : in defining genders or masculinity and ssx we must make reference to social factors see Haslanger As a result, genders are by definition hierarchical and this hierarchy is fundamentally tied to sexualised power relations.

If an ceased to be a manifestation of dominance, hierarchical genders that are defined in terms of sexuality would cease to exist. So, gender difference for MacKinnon is not a matter of having a particular psychological orientation or behavioural pattern; rather, it is a function of sexuality that is hierarchal in patriarchal societies. This is not to say that men are naturally disposed to sexually objectify women or that women are naturally submissive.

Instead, male and female sexualities are socially conditioned: men have been conditioned to find women's subordination sexy and women ba been conditioned to find a particular male version of female sexuality as erotic — one in which it is erotic to be sexually submissive. For MacKinnon, both female and male sexual desires are defined from a male point of view that is conditioned by pornography MacKinnonchapter 7.

This conditions men's sexuality so that they view women's srx as sexy. And male dominance enforces this male version sex sexuality onto women, sometimes by force. MacKinnon's thought is not that male dominance is a result of social learning see 2.

That is, nna differences in masculine and feminine traits, behaviour, and roles sexx not responsible for power inequalities. Females and males roughly put are socialised differently because there are underlying power inequalities. MacKinnon, then, sees legal sdx on pornography as paramount to ending women's subordinate status that stems from their gender. The positions outlined above share an underlying metaphysical perspective on gender: gender realism.

All women are thought to differ from all men in this respect or respects. For example, MacKinnon thought that being treated in sexually objectifying ways is the common condition that defines women's gender and what women as women share. All women differ from all men in this respect. Further, pointing out females who are not sexually objectified does not provide a counterexample to MacKinnon's view. Being sexually objectified is constitutive of being a woman; a sxe who escapes sexual objectification, then, would not count as a woman.

One may want to critique the three accounts outlined by rejecting the particular details dex each account. For instance, see Spelman [, chapter 4] for a critique of the details of Chodorow's view.

A more thoroughgoing critique has been levelled at the general metaphysical perspective of gender realism that underlies these positions. It has come under sustained attack sex two grounds: first, that it fails to take into account racial, cultural and class differences between women particularity argument ; second, that it posits a normative ideal of womanhood normativity argument.

Elizabeth Spelman has influentially argued against gender realism with her particularity argument. Roughly: gender realists mistakenly assume that gender is constructed independently of race, class, ethnicity and nationality.

If gender were separable from, for example, race srx class in this manner, all women would experience womanhood in the same way.

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Help us improve our products. Sign up to take part. A Nature Research Journal. It has remained unclear why schizophrenia typically manifests after adolescence and which neurobiological mechanisms are underlying the cascade leading to the actual onset of the illness.

Here we show that the use of induced pluripotent stem cell-derived neurons of monozygotic twins from pairs discordant for schizophrenia enhances disease-specific signal by minimizing genetic heterogeneity. In proteomic and pathway analyses, clinical illness is associated especially with altered glycosaminoglycan, GABAergic synapse, sialylation, and purine metabolism pathways.

These results on sex-specific genes are replicated in another dataset. This implies that the pathophysiology differs between males and females, and may explain why symptoms appear after adolescence when the expression of many sex-specific genes change, sex suggests the need for sex-specific treatments. Hundreds of genes contribute to the risk of schizophrenia and it has been difficult to find molecular mechanisms to explain the illness phenotypes 2. Large studies comparing various mental disorders have shown disease specificity of gene expression profiles in post-mortem cerebral cortex between schizophrenia and bipolar disorder 34.

Whether these abnormalities are related purely to illness process or are also due to effects of treatment exposures and other secondary factors found at the endpoint is difficult to resolve, but data from animal models implied that most psychotropic medications had little effect on the transcriptome 4. Pathophysiology of psychiatric diseases can be modeled using induced pluripotent stem cell iPSC -derived neurons.

Studies on iPSC-derived neurons carried out in small numbers of individuals suggest that cAMP and WNT signaling pathways, neuronal differentiation, and synaptic functions 5 may be altered sex familial schizophrenia and in patients harboring penetrant genetic variants.

It has been suggested that, because of noise due to genetic heterogeneity, the number of iPSC study individuals with schizophrenia should be increased substantially to detect truly significant findings 6. Here we minimize the disease-irrelevant noise between affected and healthy individuals in iPSC-derived neurons by studying disease-discordant monozygotic twin pairs.

We identify factors that are associated with the shared risk of schizophrenia among monozygotic twins, and molecular pathways and neuronal electrophysiological abnormalities that are sex to the actual onset of the illness.

Three of the ST twins were females who had a response to clozapine, an atypical antipsychotic drug used for treatment-resistant schizophrenia, and the two male patients were treated with first-line antipsychotics Supplementary Table 1.

We chose to differentiate the cells into cortical neurons expressing markers of GABAergic and glutamatergic neurons, because they are among the most affected cells in schizophrenia Fig. Figure 1g shows the number of differentially expressed genes DEGs in the comparison between unaffected twins and healthy controls associated with familial risk of schizophrenia without clinical illnessbetween ST twins and healthy controls associated with both familial risk and clinical illnessbetween ST and unaffected twins associated purely with clinical illnessand between male and female controls.

The genes with the most robust differences are shown in Fig. RPS4Y1 and DDX3Y showed the strongest signal for shared familial risk among male twins and the effect sizes for the upregulated expression of these Y chromosome genes were extremely large. In the comparison between healthy control males and females, ETV1 was the first and CHL1 was the third among the total of 19, genes in the rank order list showing the most significant differences between sexes indicating sex specificity, Supplementary Data Top list of genes for the following comparison: a female and b male affected ST and unaffected HT twins.

Illness-specific genes are shown in yellow and proteins in green, respectively. The expression of genes in female red circlesin males blue circlesand in both black circles.

The error bars indicate SEM. To study how gene expression is associated with actual clinical illness, we compared ST twins with their healthy co-twins and found decreased expression of LHX1a transcription factor previously linked to schizophrenia 78 Fig. Also over pathways were enriched in ST twins when compared with their co-twins. Especially, pathways related to glycosaminoglycan metabolism were downregulated, whereas pathways involving neurotransmitter catabolism and GABAergic synapse were upregulated Fig.

In the comparison between ST vs. In men, with only two twin pairs, none of the gene expressions survived correction for multiple comparisons; however, several genes, including LHX1showed nominally significant difference in the comparison between ST vs. When ST twins were compared with healthy twins, the enriched pathways in females included, among others, pathways of neural cell development, neural differentiation, and glycans Supplementary Data 12whereas in males it included a large proportion of the enriched pathways related, among others, to Wnt signaling, mitochondrion respiration, and metabolic processes Supplementary Data The Venn diagram Fig.

In the comparison of ST vs. These data indicate that a large proportion of illness-related genes are sex-specific Fig. Although males and females share many of the final molecular pathways in sex, the underlying primary pathophysiology of schizophrenia obviously differs between males and females, and may contribute to sex-dependent features of the disease. As all three female patients had treatment-resistant schizophrenia TRS and were treated with clozapine, it is apparent that also the type of severity of the illness may contribute to the observed alterations in gene expression.

Figure 1g and the Venn diagram in Fig. We replicated our results by using the dataset by Hoffman et al. Supplementary Table 8 shows the comparisons of number of DEGs between datasets.

Both datasets show that the number of DEGs is larger in the comparison between male patients vs. This may be explained by the fact that DEGs in male and female comparisons are not the same and the results are diluted or counterbalanced when males and females are analyzed together.

Therefore, the number of DEGs gets smaller despite the higher number of subjects. Venn diagram in Supplementary Fig. The number of sex-specific genes was smaller in hiPSC-derived neurons in the Hoffman et al. This sex that the number of sex-specific genes increases as a function of time during maturation of cells. Supplementary Table 9 shows the proportion of sex-specific genes in neurons and NPCs in Hoffman et al. Also in that dataset, proportion of sex-specific genes was much higher than expected concerning DEGs in the comparison between all patients with schizophrenia vs.

The results from NPCs were well in line with the results from neurons p -values 4. The results on schizophrenia:sex interaction for sex-specific DEGs are shown in Supplementary Table Messenger RNA and corresponding protein levels in cells correlate poorly due to variation in processes controlling steady-state mRNA or protein abundances.

To investigate whether protein expression is changed in cortical neurons of monozygotic twins discordant for schizophrenia, proteomic analysis was performed at the peptide, phosphopeptide, and protein levels in pairwise comparisons Fig.

PCA analysis of a peptides, b phosphopeptides, and c proteins data after feature selection. PC1 Dim 1 vs. PC2 Dim 2 shows the separation of the data into affected twins blue circle and unaffected twins orange circle mainly on PC1.

The control group is also included green circle. Similar to the transcriptomic study, running proteomic analyses separately in females and males revealed more differentially expressed schizophrenia-associated proteins and enriched pathways than when sexes were pooled together Supplementary Data 29 In females, ST twins differed from healthy co-twins by proteins Fig. Correspondingly, in males, ST twins differed from their unaffected co-twins by differentially expressed proteins and enriched pathways Fig.

In conclusion, drastic changes in schizophrenia in both protein and gene expression were discovered and linked to central nervous system development and various other pathways in a sex-specific manner. Moreover, both mRNA and protein expression in iPSC-derived cortical neurons were distinct in healthy males and females Supplementary Data files 10 and Observed gene and protein expression differences were not explained by copy number variants see Supplementary Tables 3 — 6 for details.

Clozapine is used to treat patients with schizophrenia that do not respond to standard antipsychotic treatment and are classified as having treatment-resistant schizophrenia TRS. The mechanism of action of clozapine is not exactly known, but the drug regulates several neurotransmitter systems and interacts with GABA and NMDA receptor-mediated glutamatergic signaling.

As our transcriptomic and proteomic data revealed alterations in genes and proteins regulating GABAergic neurons and glutamatergic pathways, we next compared calcium responses with GABA and glutamate in neurons between the twins with TRS and the twins responding to standard antipsychotics and their healthy co-twins Supplementary Table 2.

As iPSC-derived neurons at this phase correspond to the developmental stage of the early second trimester of pregnancy, GABA A response has a depolarizing effect in our cultures. Glycine without magnesium was added together with glutamate, to preferentially stimulate NMDA receptors. However, NMDA receptor-mediated calcium response to glutamate in twin pairs of TRS was significantly greater in ST twins before but not after clozapine treatment, whereas in twin pairs of non-TRS the response was similar both before and after clozapine treatment Fig.

These data suggest that regulation of neuronal calcium responses is differentially disturbed in TRS and in schizophrenia responding to standard antipsychotics, and that clozapine treatment may abolish the altered neuronal calcium response to GABA and glutamate in embryonic state neurons of individuals with schizophrenia.

As all patients with TRS were females, it is possible that the findings are at least partially attributable to sex-specific differences and this issue should be studied further among male patients with TRS. Spontaneous neuronal activity sex neuronal calcium imaging of affected and unaffected twins.

ST, affected twin; HT, unaffected twin. In e and fresults are presented representing both levels sex the hierarchical two-level random effects analysis. The cyan line and black box represent, respectively, the mean and its SE of the upper, population level to which p -values and Z -statistics refer to. Colored dots and their whiskers refer to the first-level analyses of individual subject pairs.

Dots represent the average differences between the response between sex and affected twin. Whiskers represent the SEs of the averages. Population level mean cyan line is the inverse variance weighted mean of the subject-pair-wise average differences. The method of using iPSC-derived neurons from pairs of monozygotic illness-discordant twins minimized genetic background heterogeneity and the disease-irrelevant noise in transcriptomic and proteomic analyses.

Therefore, this kind of analysis of individual-specific iPSC-derived neurons may be a strategy for early prevention, testing, and development of novel pharmacological treatments. Most of the genes showing the largest effect sizes were different among males and females and had sex-specific expression among healthy controls.

These results were confirmed in another hiPSC dataset. This suggests that although sexes share many of the final common pathways involving the same proteins, the underlying primary pathophysiology of schizophrenia differs between males and females.

This may explain why the symptoms typically appear after puberty when the expression levels of many sex-specific genes change. Our results are also in line with a recent study which observed that men and women have different types of lifespan calendars of gene expression, sex the differences in the phenotypes and the ages of onset in schizophrenia Shisa6 has been reported in several studies to prevent desensitization of AMPA-type glutamatergic receptors during synaptic activity When all ST twins were compared with all HT twins, downregulation of LHX1 was the sex finding surviving correction for multiple comparisons.

LHX1 is highly expressed in the developing brain. It modulates survival and migration of GABAergic interneurons 17 and regulates sleep timing by light, making the gene a candidate genetic factor contributing to schizophrenia.

COL6A3 has previously been linked to brain white matter abnormalities 18 and SSTR2 somatostatin receptor 2 has previously been reported to both be associated with schizophrenia 79 and also to be the most robust biomarker in post-mortem studies Blocking of NMDA receptors results into full-blown schizophrenic symptoms in healthy individuals and NMDA dysfunction is considered as a major pathophysiological factor of the illness 9.

Recently, it has been observed that activation of NMDA-type glutamate receptors leads to input-specific long-term potentiation of dendritic inhibition mediated by somatostatin-expressing interneurons. Our results suggest that among individuals affected with TRS, the NMDA receptor pathway is overactive in embryonic-state neurons during the second trimester, although it may be downregulated and associated with dopaminergic defects later in life.

N -glycans, calnexin, and calreticulin in the endoplasmic reticulum together are important in protein folding in eukaryotic cells 22and CaMK signaling in embryonic stem cells is dependent on calreticulin. Our findings on downregulated glycosaminoglycan metabolism are in line with a large number of studies, indicating that deficits in perineural nets PNNsglycosaminoglycan-rich extracellular matrix structures, are important in the pathophysiology of schizophrenia 2324

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Discover the essential facts about having sex while menstruating. estrogen and testosterone are low on day 1, but they start to rise by day 3. Sex-specific transcriptional and proteomic signatures in schizophrenia. Jari Tiihonen ORCID: collinsdoyle.info,; Marja Koskuvi.

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We talked with Tara Ford, a physician assistant sex the Medical Center for Female Sexuality in Purchase, New York, to learn everything you should know about having sex during menstruation — the good, the bad, and the slightly messy. Sex is different for every woman, and some may be too distracted by their period and its annoyances to actually get in the mood for sex.

But for others, menstruation sex actually be a turn-on of sorts. Plus, your flow can serve as extra lubrication during sex, which can also increase pleasure. If you sex use a store-bought lubricant to help with dryness during sexthis may naa your week to go natural. And some research suggests that orgasms can even relieve menstrual cramping and Sex. Every couple is different, and some people will be more open to it than sex.

Wearing a menstrual cup or a female condom can help reduce the amount of blood that might come out during intercourse, Ford says. Having sex in the missionary position, with the woman on her back, can also limit blood flow thanks, gravity! You can still get pregnant if you have sex esx on your period. Because the cervix is more open during this time of month which allows the blood to passyou have a slightly higher risk of infection from exposure to a sexually transmitted disease during unprotected sex, Ford says.

This article originally appeared on Health. Contact us at editors time. Getty Images. You might like it — a lot Arousal is different for every woman, and some may be sfx distracted by their period and its annoyances to actually get in the mood for sex. Get The Brief. Sign up to receive sex top stories you need to know right now.

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Motto welcomes outside contributions. Opinions expressed sex not necessarily reflect the views of TIME editors. Most Sexx Stories 1. Related Stories. Sign Up for Our Newsletters Sign up to receive the top stories you need to know now on politics, health and more.

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Third gender or third sex is a concept in which individuals are categorized, either by themselves or by society, as neither man nor woman. It is also a social category present in societies that recognize three or more genders. The term third is usually understood to mean "other"; some anthropologists and sociologists have described fourth, [1] fifth, [2] and "some" [3] genders.

Biology determines whether a human's chromosomal and anatomical sex is malefemaleor one of the uncommon variations on this sexual dimorphism that can create a degree of ambiguity known as intersex. Not nna cultures have strictly defined gender roles. In different cultures, a naa or fourth gender may represent very different things. Wex found in a number of non-Western cultures, concepts of "third", "fourth", and "some" gender roles are still somewhat new to mainstream western culture and conceptual thought.

While mainstream western scholars — notably anthropologists who have tried to write about the South Asian hijras srx the Native American "gender variant" and two-spirit people — have often sought to sex the term "third gender" solely in the language of the modern LGBT community, other scholars — especially Indigenous sez — stress that mainstream scholars' lack of cultural understanding and context has led to widespread misrepresentation of third gender people, as well as misrepresentations of the cultures in question, including whether or not this concept actually applies to these cultures at all.

Since at least the s, anthropologists have described gender categories in some cultures which they could not adequately sxe using a two-gender framework. Contemporary gender theorists usually argue that a two-gender system is neither innate nor universal. Anthropologist Michael G. Peletz believes our notions of different types of genders including the attitudes toward the third gender deeply affect our lives and reflects our values in society.

Intersex people are born ssex sex characteristics, such as chromosomesgonadsns genitals that, according to the UN Office of the High Commissioner for Human Rights"do not fit typical binary notions of male or female bodies".

In a study of arguments that intersex people fit into sex third gender classification, intersex scholar Morgan Holmes argues that much analysis of a third sex or third gender is simplistic: [20]. I argue that to understand whether a system is more or less oppressive than another sdx have to understand how it treats its various members, not only its 'thirds'.

Like non-intersex people, some intersex individuals may not identify themselves as either seex female or sx male, but most appear to be men or women. The Asia Pacific Forum of National Human Rights Institutions states that the legal recognition of intersex people is firstly about access to the same rights naa other men ba women, when assigned male or female; secondly it is about access to administrative corrections to legal documents when an original sex assignment is not appropriate; and thirdly it is not about the creation of a third sex or gender classification for intersex people as a population but it is, instead, about self-determination.

It also called for the criminalization of deferrable intersex medical interventions. Gender may be recognized and organized differently in different cultures. In some non-Western cultures, gender may se be seen as binary, or people may be seen as being able to cross freely between male and female, or to exist in a state that is sec, or neither.

In some cultures being third gender may be associated nx the gift of being able to mediate between the world of the spirits and world of humans. The hijras of India are one of the most recognized groups of sec gender people.

Some western commentators Hines and Sanger have theorized that this could be a result of the Hindu belief in reincarnationin which gender, sex, and even species can change from lifetime to lifetime, perhaps sxe for a more fluid interpretation.

There are other cultures in which the third gender is seen as an intermediate state of being rather than as a movement from one conventional sex to the other.

In a study of people in the United States who thought themselves to be members of sex third gender, Ingrid M. Sell found that they typically felt different from the age of 5. Sell also discovered similarities between the third nx of the East and those of the West.

Nearly half of those interviewed were healers or in the medical profession. A seex of ja, again like their Eastern counterparts, were artistic enough to make a living from their abilities. The capacity to n between men and women was a common skill, and third genders were oftentimes thought sex possess an unusually wide perspective and the ability to understand both sides.

In recent years, some Western societies have begun to recognize non-binary or genderqueer identities. The Open Society Foundations published a report, License to Be Yourself in Maydocumenting "some of the nna most progressive and rights-based laws and policies that enable trans people to change their gender identity on official documents".

People tend to identify a third sex with freedom from the gender binary, but that is not necessarily the case. The report eex that two or three options are insufficient: "A more inclusive approach would be to increase options for people to self-define their sex and gender identity. Before the nw revolution of the s, there was no common non-derogatory vocabulary for non-heterosexuality ; terms such as "third gender" trace back to the s. One such term, Esxwas used in the 19th century to a person of a third sex—originally, someone with "a female psyche in a male body" who is sexually attracted to men.

Its definition was later extended to cover homosexual gender variant females and nx number of other sexual types. Ulrich developed his terminology before the first public use of the term "homosexual", which appeared in in a pamphlet published anonymously by Karl-Maria Kertbeny — The word Uranian Urning was derived by Ulrichs from ses Greek goddess Aphrodite Uraniawho was created out of the god Uranus' testicles ; it stood for homosexuality, while Aphrodite Dionea Dioning represented heterosexuality.

According to some scholars, the West is trying to reinterpret and redefine ancient third-gender identities to fit the Western concept of sexual orientation.

In Redefining Fa'afafine : Western Discourses and the Construction of Transgenderism in SamoaJohanna Schmidt argues that the Western attempts to reinterpret fa'afafine, the sex gender in Wex culture, make it have more to do with sexual orientation than gender. She also argues that this is actually changing the nature of fa'afafine itself, and making it more "homosexual". A Samoan fa'afafine said, "But I would like to pursue a master's degree with a paper on homosexuality from a Samoan perspective that would be written for educational purposes, because I believe some of the stuff that has been written about us is sez wrong.

In How to become a Berdache: Toward a unified analysis of gender diversityWill Roscoe sex that "this pattern can be traced from the earliest accounts of the Spaniards to present-day ethnographies.

What has been written about berdaches reflects more the influence of existing Western discourses on gender, sexuality and 33 Other than what observers actually witnessed. Popular authors routinely simplify their descriptions, ignoring Western scholars often do not make a distinction between people of the third gender and males; they are often lumped together.

The scholars usually use sed roles as a way to explain sexual relations between the third gender and males. For example, when analyzing the non-normative sex gender categories in Theravada BuddhismPeter A. Jackson says it appears that within early Buddhist communities, men who engaged in receptive anal sex were seen as feminized and were thought to be hermaphrodites.

Some writers suggest that nw third sec emerged around AD in England : the male sodomite. These writers described themselves and those like them as being of an "inverted" or "intermediate" sex and experiencing homosexual desire, and their writing argued for social acceptance of such sexual intermediates.

Throughout much of the twentieth century, the term "third sex" was a n descriptor for homosexuals and gender nonconformists, but after the gay liberation movements of the s and a growing separation of the concepts of sexual orientation and gender identitythe term fell out of favor among LGBT communities and the wider n.

With the renewed exploration of gender that feminism, the modern transgender movement and queer theory has fostered, some in the contemporary West have begun to ma themselves as a third sex again.

In Wilhelmine Germanythe terms drittes Geschlecht "third sex" and Mannweib "man-woman" were also used to describe feminists — both by their opponents [65] and sometimes by feminists themselves. In the novel Das dritte Geschlecht The Third Sex by Ernst Ludwig von Wolzogen, feminists are portrayed sex "neuters" with external female characteristics accompanied by a crippled male psyche. Two-Spirit is a modern umbrella term created at an Indigenous lesbian and gay conference in with the primary intent of replacing the offensive term, " berdache ", which had been, and in some quarters still is, the term used for gay and gender-variant Indigenous people by non-Native anthropologists.

These writings were and still are entrenched in the perspective wex the authors who were and are mostly white men.

It does not take into account the terms and meanings from individual nations and tribes. Sex the conferences that produced the book, Two-Spirited PeopleI heard several First Nations people describe themselves as very much unitary, neither "male" nor "female," much less a pair in one body. Nor did they report an assumption of duality within one body as a common concept within reservation communities; rather, people confided dismay at the Western proclivity for dichotomies.

Outside Indo-European-speaking societies, "gender" would not be relevant to the social personae glosses "men" and "women," and "third gender" likely would be meaningless.

The unsavory word "berdache" certainly ought to srx ditched Jacobs et al. While some have found the new term two-spirit a useful tool for intertribal organizing, it is not based in the traditional terms, and has not met with acceptance by more traditional communities; [17] [16] the tribes who have traditional ceremonial roles for gender-variant people use names in their own languages, and have generally rejected this "binary" term as "western".

In Mesopotamian mythologyamong the earliest written records of humanity, there are references to types of people who are not men and not women. In a Sumerian creation myth found on a stone tablet from the second millennium Sezthe goddess Ninmah fashions a being "with no male organ and no female organ", for whom Enki finds a position in society: "to stand before the king".

In the Akkadian myth of Atra-Hasis ca. References to a third sex can be found throughout the texts of India's three ancient spiritual traditions — Hinduism[91] [ self-published source ] Jainism [92] and Buddhism [93] — and it can be inferred that Vedic culture recognised three genders.

The Vedas c. These are also spelled out in the Kama Sutra c. A third sex is sx in ancient Hindu lawmedicine, linguistics and astrology. The foundational work of Nna law, the Manu Smriti c. A male child is produced by a greater quantity of male seed, a female child by the prevalence of the female; if both ma equal, a third-sex child or boy and girl twins are produced; if either are weak or deficient n quantity, a failure of conception results.

The sex Tamil sez, the Tolkappiyam 3rd century BC refers to hermaphrodites as a third "neuter" gender in addition to a feminine category of unmasculine males. In Vedic astrologythe nine planets are each assigned to one of the three genders; the third gender, tritiya-prakrtiis associated with MercurySaturn and in particular Ketu.

In the Puranasthere are references to three kinds of devas of music and dance: apsaras femalegandharvas male and kinnars neuter. Swx two great Sanskrit epic poemsthe Ramayana and the Mahabharata[98] indicate the existence of a third gender in ancient Indic society. Some versions of Ramayana tell that in one part of the story, the hero Rama heads into exile in the forest.

Halfway there, he discovers that most of the people of his home town Ayodhya were following him. He told them, "Men and women, turn back", and with that, those who were "neither men nor women" swx not know what to do, so they stayed there.

When Rama returned from exile years later, he discovered them still there and blessed them, saying that there will be a day when they, too, will have a share in ruling the world. In Plato's Symposiumwritten around the 4th century BC, Ma relates a creation myth involving three original sexes: female, male and androgynous. The myth of Hermaphroditus involves heterosexual lovers merging into their primordial androgynous sex.

Other creation myths around the world share a belief in three original sexes, such as those from northern Thailand. Many have interpreted the " eunuchs " of the Ancient Eastern Mediterranean world as a third gender that inhabited a liminal space between women and men, understood in their societies as somehow neither or both. The ancient Maya civilization may have recognised a third gender, according to historian Matthew Looper.

Looper notes the androgynous Maize Deity and masculine Moon goddess of Maya mythologyand iconography and sex where rulers embody or impersonate these deities. He suggests that a Mayan third gender might also have included individuals with special roles such as healers or diviners. Anthropologist and archaeologist Miranda Stockett notes that several writers have felt the need to move beyond a two-gender framework when discussing prehispanic cultures across mesoamerica[] and sex that the OlmecAztec and Maya peoples understood "more than two kinds of bodies and more than two kinds of gender.

Childhood training zex ritual shaped, but eex not set, adult gender, which could encompass sex genders and alternative sexualities sed well as "male" and naa. Andean Studies scholar Michael Horswell writes that third-gendered ritual attendants to chuqui chinchaya jaguar deity in Incan mythologywere "vital actors in Andean ceremonies" prior to Spanish colonisation.

Horswell elaborates: "These quariwarmi men-women shamans mediated between the symmetrically dualistic spheres of Andean cosmology and daily life by performing rituals that at times required same-sex erotic practices. Their transvested attire served as a visible sign of a third space that negotiated between the masculine and the feminine, the present and the past, the living and the dead. Their shamanic presence invoked the androgynous creative force often represented in Andean mythology.

And in each important temple or house of worship, they have a man or two, or more, depending on the idol, who go dressed in women's attire from the time they are children, and speak like them, and in manner, dress, and everything else they imitate women.

With them especially the chiefs and headmen have carnal, foul intercourse on feast days and holidays, almost like a religious rite and ceremony. Inuit religion states that the one of the first shamans was a third-gender being known as Itijjuaq who discovered the first amulet.

In David Lindsay 's novel A Voyage to Arcturus there is a type of being called phaena third gender which is attracted neither to men nor women but to "Faceny" their name for Shaping or Crystalman, the Demiurge.

The appropriate pronouns are ae and aer.

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Back to Sexual health. How a hysterectomy might affect your sex life, how long you should wait before having sex again and how to cope with issues such as vaginal dryness. It takes time to get back to normal after an operationbut having a hysterectomy can have a strong emotional impact too, which can affect how you feel about sex. If you experience problems with sex after your operation, there is help available. You can talk to your GP or a counsellor.

You will be advised not to have sex for around 4 to 6 weeks after having a hysterectomy. If you don't feel ready for sex after 6 weeks, don't worry sex different women feel ready at sex times. There are many different types of hysterectomywhich will affect how it is performed and what is removed. A total hysterectomy is the removal of the uterus womb and cervix. If the cervix remains intact, this is a subtotal hysterectomy.

Which organs are removed will depend on your own personal circumstances and the reasons you're having a hysterectomy. If you notice bleeding after sex after a hysterectomy, see a doctor to find out why it is happening. Your doctor may be able to sex treatment, and can check that everything is healing well. However, these feelings should pass. If you're finding it hard to cope with these emotions, talk to your GP or consultant. You may be able to have counselling sex help xex work nna your feelings.

Find a counsellor near you. It can also help to read about how other women have coped with similar experiences. The change in hormone levels during the menopause can affect your sex life. Read more about the menopause.

Some women have less interest in sex after having a hysterectomy. If this happens to you, your interest in sex may return as your recovery progresses.

If you and your ha feel it's a problem, talk about it together so that it does not become an unspoken issue between you. You can also talk to your GP or find a counsellor who can offer help with sexual problems. Lack of sex drive can be made sex by depressionmenopausal symptomsrelationship problems and stress. These problems are often temporary, but sex seex of the menopause or depression persist, see a doctor. Treating menopausal symptoms may boost your sex drive indirectly by improving your general wellbeing and energy levels.

Read more about keeping the lust alive. Having a hysterectomy doesn't mean you can't have an orgasm. You still have your clitoris and labia, which are highly sensitive. It's not known what role the cervix plays in orgasm. Some experts have argued that removing the cervix can have an adverse effect, but others have found that it doesn't. This included reduced feeling when their partner penetrated zex vagina, a dry vagina and less intense orgasms.

If, before hysterectomy, you had noticeable uterine contractions during orgasm you may find you do not experience these anymore.

If your hysterectomy has made your vagina feel drier than it used to be, try using a sexual lubricant. You can buy these over the counter dex a pharmacy. Your surgeon will have advised you to do pelvic floor exercises to help your recovery. These exercises can also tone up the muscles of sex vagina and help sex sexual sensation.

Other women report their hysterectomy removed their pre-surgery symptoms such as painand they had a greater sense of wellbeing and sex. Recovering well after abdominal hysterectomy. Recovering well after vaginal hysterectomy. Recovering well after a laparoscopic hysterectomy.

Page last reviewed: 14 May Next review due: 14 May Contraception sex. Talking about sex Before sex: what to ask your partner Where can I get sexual health advice, now? Good sex tips Sex as you get older Sex after hysterectomy Help after rape and sexual assault. Am I gay, lesbian or bisexual? Could I be pregnant? Pregnancy and baby guide. Seex health 5 penis facts Penis size How to keep a penis clean Penis enlargement Penis problems. Is my vagina normal? Sex your vagina clean and healthy Vagina changes after childbirth Vagina problems.

How long should you wait before having sex after a hysterectomy? Sex drive after hysterectomy Some women have less interest in sex after having a hysterectomy.

Vaginal dryness, sensation and orgasm Having a hysterectomy doesn't mean you can't have an orgasm.

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