I'm 51, and don't identify as a woman, it's more an identity that's not male or female, but contains elements of each. With hindsight it's obvious that some (but not all) of my brain development occurred as female instead of male, and that's why I've never fitted in properly as a man. However, there's too much of me that's male for living as a woman to ever be an option, so I'm stuck in a kind of no man's land in the middle. I was trying to figure out what parts of my brain are female and what parts male, and I think my limbic system (and hence my subconscious mind) is largely female, whereas my cerebral cortex (the part that handles consciousness and abstract thought) is male.
I've got enough in common with the DES "babes" I've chatted to over the last couple of years to know I had some kind of exposure to synthetic hormones, which I think must have been during the second trimester only (so I had normal male hormone levels and male brain development during the third trimester of my prenatal development).