Quote from: Mavis on January 04, 2016, 09:35:18 AM
Do you also have any links/data you can share on the subject, it has been argued to me that feminine ways/likes/dislikes/body language are a learned behavior even in CIS women stating that if all men and women were raised to wear the same things and act the same way then transgender would not exist further pushing on their point that it is not a birth defect or genetic issue but rather a non fixable result on the brain when the child is detached from a parent at a young age.
There was a popular theory that people are born "gender neutral", and that people's gender-related behaviour and preferences are the result of early life experiences. On the basis of that theory, thousands of infants with damaged or abnormal genitals were subjected to sexual reassignment surgery to whichever sex suited doctors better (usually female). Since gender was supposed to be learned rather than innate, the assumption was that people who'd had this done to them would simply adopt their new gender, and live their lives without ever knowing that they were born the opposite sex. However, it hasn't worked out like that. A very high proportion of these infant reassignments have gone badly wrong, with the child failing to fit in as their reassigned gender, and often spontaneously reverting to their birth gender later in life. The most infamous example of this happening is the David Reimer case, but there have been many other less publicised cases that have had a similar outcome.
Basically, your gender identity, along with most of your gender based behaviour and preferences, is hardwired into the structure of your brain, and is already in place by the time you're born. As with other aspects of sexual development, whether you get the male or female version doesn't depend directly on genetics, but is instead determined by what hormones you're exposed to during the time your prenatal development is taking place. There are genetic conditions that can cause your prenatal hormone production to go wrong and give rise to physical intersex conditions and/or ->-bleeped-<-, however it's the abnormal hormone levels that it induces (or abnormal hormone receptor response in the case of AIS) that cause this to happen, not the altered gene itself. It's also possible for exposure to external hormones or hormone-mimicking chemicals to interfere with normal sexual development in the fetus. If you've seen some of the other stuff I've posted on this site, there's a lot of us MTF and transfeminine people in the over 40s age group who were exposed to an artificial estrogen called DES, that used to be used as a treatment for preventing miscarriages.
https://www.quora.com/What-causes-a-person-to-be-transgender/answer/Hugh-Easton-1