The Science They Don’t Want You to Know About Transgender People The genitals and the brain develop at different times in the womb. The genitals form between weeks six and twelve of pregnancy. The brain develops its sex characteristics separately, in the second half of pregnancy, under a different hormonal environment. Two separate processes. Two different timelines. When they produce different outcomes in the same person, you get a transgender person. This is not opinion. It is published embryology. It has been in peer reviewed scientific journals since 1995, including Nature, one of the most respected scientific journals on earth. Over 100 genetic associations with transgender identity have been documented. Brain structure differences are present before any medical treatment begins, which means they are developmental, not caused by transition. Twin studies confirm a genetic contribution. Girls exposed to higher androgens in the womb show significantly higher rates of gender nonconformity. Every major medical institution on earth, the WHO, the American Medical Association, the Royal College of Psychiatrists, recognises this as naturally occurring biological variation. Over 40 intersex variations exist. People born with XY chromosomes and fully female anatomy. People born with both genitalia. People whose chromosomes are neither XX nor XY. The binary is not a biological fact. It is a simplification that nature routinely ignores. The Hijra community of South Asia has been documented for over four thousand years. Two-Spirit people held recognised roles across hundreds of Indigenous nations. Gender diversity is recorded in ancient Sumer, Egypt, Mesopotamia, Greece, Rome and every continent on earth. Transgender people are not new. The science explaining why they exist is not new either. It just does not get reported the same way as the arguments about bathrooms. Now you know why trans people exist