But what does that mean, a male brain, or a female brain, or even a transgender one? It’s a fraught topic, because brains are a collection of characteristics, rather than a binary classification of either/or.

And yet scientists continue to study the brain in hopes of understanding whether a sense of the gendered self can, at least in part, be the result of neurology. A study described by author Francine Russo in Scientific American examined the brains of 39 prepubertal and 41 adolescent boys and girls with gender dysphoria. The experiment examined how these children responded to androstadienone, a pungent substance similar to pheromones, that is known to cause a different response in the brains of men and women. The study found that adolescent boys and girls who described themselves as trans responded like the peers of their perceived gender. (The results were less clear with prepubescent children.)

The most infuriating assertion regularly made by the "trans women are biologically male" camp is that trans people are somehow "denying" or "erasing" biological sex differences, and that this hurts cisgender women/"[w:Female|biological females]].” This is patently untrue. I can assure you that trans people are highly aware of biological sex differences — the fact that many of us physically transition demonstrates that we acknowledge that sexually dimorphic traits exist and may be important to some people! I would reframe things this way: Transgender people often have a more complicated relationship with our sex-related traits (as they may be discordant with our identified and lived genders), and thus the language that we use to describe or discuss these traits may seem arcane, or nonsensical, or unnecessary to the average cisgender person. And because they are unfamiliar with this language (and/or flat-out antagonistic toward us), some cisgender people will subsequently misinterpret this language and differing perspective as some sort of "denial."

The mind of the transsexual cannot be changed

When we talk about trans people, we’re usually referring to individuals who were either recorded as male at birth but who understand themselves to be women (trans women) or, vice versa, were recorded as female at birth but who understand themselves to be men (). Not all trans people, however, find simply moving between the pre-existing categories of man and woman satisfactory, accurate or desirable. Such trans people, who are less well understood, generally unsettle mainstream society more than trans men and women, because they challenge not only the prevailing idea that birth genitals and gender are inseparable, but also the idea that there are just two gender categories. Often, these people are accused of making up their experience out of a need for attention or a desire to feel special – though in reality the political, economic and social costs for such ‘non-binary’ trans people (who don’t straightforwardly see themselves as men or women) can be immense.

Trans women differ greatly from one another. Perhaps the only thing that we share in common is a self-understanding that there was something wrong with our being assigned a male sex at birth and/or that we should be female instead. While some cisgender people refuse to take our experiences seriously, the fact of the matter is that transgender people can be found in virtually every culture and throughout history; current estimates suggest that we make up 0.2 – 0.3% of the population [or possibly more]. [...] In other words, we simply exist.

Claims that trans women are not women often rely on essentialist (and therefore incorrect) assumptions about biology. For instance, people might argue that trans women are not “genetically female,” despite the fact that we cannot readily ascertain anybody’s sex chromosomes. Indeed, most people have never even had their sex chromosomes examined, and those that do are sometimes surprised by the results. Other common appeals to biology center on reproduction — e.g., stating that trans women have not experienced menstruation, or cannot become pregnant. This ignores the fact that some cisgender women never menstruate and/or are unable to become pregnant. Claims about genitals are similarly problematic: Women’s genitals vary greatly, and as with chromosomes and reproductive capabilities, we cannot readily see other people’s genitals in everyday encounters. If you and I were to meet, should I refuse to recognize or refer to you as a woman unless you show me your genitals? And frankly, what could possibly be more sexist than reducing a woman to what’s between her legs? Isn’t that precisely what sexist men have been doing to women for centuries on end?

It is important to realize that the framing of trans people as ‘parodies’ who reinforce stereotypes cruelly disregards the ways in which those same British trans people – whose gender expression, dress, hairstyles, makeup preferences and so on have, it clearly needs to be said, always varied as much as their cisgender counterparts’ – have spent the past fifty years being coerced into narrow gender conformity by their doctors, then mocked and derided as too stereotypical and regressive by cis onlookers. If it sounds like a catch-22, it’s because it is.

I’m really interested in male and female brains and whether female brains or male brains are better at maths. You sit men and women down and give them a maths test and they will do fairly equally. Then you set up the same test, but with different people, and make them tick a box to say whether they are a man or a woman, and the women do significantly worse in the maths test than they did previously in a group set.

The fact is that we don't know enough about hormonal effects on the human brain to have a very specific theory of how Danny's brain could have developed in a feminine direction while his body developed masculine. If Danny's body also showed signs of feminine development, this would support nature theory, but the lack of anatomical femininity does not disprove it. There has been essentially no research on boys like Danny that is directly biological. Short of dissecting the brain of a feminine boy and comparing it with normal boys' and girls' brains, it is unclear what we would even look for. However, the best conceivable direct test of nurture theory has been tried, and it failed. Amanda became Jason again.

Trans feminists seek to interrogate society’s ingrained assumptions about the social and cultural meanings we ascribe to biology. They also generally incorporate an analysis of intersex people, who do not fit this reductive model, and who have suffered historical and ongoing mistreatment at the hands of a medical establishment obsessed with imposing binary biological sex on to bodies that don’t ‘fit’. The experiences of trans and intersex people show us that not all humans fit perfectly into two clear-cut categories of biological sex; indeed, the belief there are two separate sex categories is itself an erasure of sex variations that occur either naturally or through medical modification. The global dominance of men over women can never be dismantled while simultaneously maintaining, preserving and reinforcing the binary model of sex and gender.

trans women are trans women

I have never heard any research that say the brain of a man is bigger or smarter than that of a woman, it is the society that made the woman not to develop her potentials. Men hold grip of positions and they believe it is the best for the society

Trans women are women. We may not be “exactly like” cis women, but then again, cis women are not all “exactly like” one another either. But what we do share is that we all identify and move through the world as women. And because of this, we all regularly face sexism. That is what we should be focusing on and working together to challenge. And as I said at the outset, forcing trans women into a separate group that is distinct from cis women does not in any way help achieve feminism’s central goal of ending sexism. In fact, it only serves to undermine our collective cause.