Hi All: First let me say that if Ann Landers was here today she would likely admit that this info is dated and probably not accurate. She was always ready to admit when she was wrong. To her credit she helped me when I was a teen by writing advice for a man who wanted to buy womens underwear. After reading her advice I was able to get the courage to do it.
In my case my mother was under great stress when I was en utero. Aside from being maried to man who didn't want children and was constantly berrating her and screaming at her, she was on the ragged edge of always being in congestive heart failure. She was 40yo when I was born, and she had a damaged heart valve from "rhumatic fever" IE untreated strep in her teen yrs.
I was also forced crying in to my older sister's gingham partydress, panties, lacey socks and maryjanes at age 4, in front of her and 2 playmates giggling the whole time, by my mother who was only being playful. My grandmother would always say to me "its a shame U were not a girl with that great complexion".
Last but not least my father was cold and always ready to fly into an angry rage that ended with physical abuse to my mother or sister or me. My sister today has struggled a lifetime with an eating disorder that was likely caused from this abuse. There is almost no way I cold not have been a crossdresser.