I had six-pack abs without trying. Because during certain stages in his development, he was a testosterone making machine. The hypothesis is based on the idea that within the uterus twins exchange hormones either via the maternal bloodstream or directly through the amniotic membrane. I competed with men in business for over 25 years and usually came out on top. Remember me Notify me by e-mail about comments. For example, increased aggression has been attributed to relatively high prenatal testosterone exposure. She can be very girly, but she is also an incredible athlete, loves watching more aggressive TV than most of her friends, and has a shorter index finger than ring.
This testosterone turns on genes that end up making the fetus into a boy.
Homosexual orientation in twins: a report on 61 pairs and three triplet sets.
I have often wondered if she will turn out to be gay. Some traits, like finger length ratio, are determined by our genes and exposure to hormones during development. I would love to chat more about it. Now I really feel like a freak of nature. Because during certain stages in his development, he was a testosterone making machine. The New Zealand Herald.