munch.png
[Hide] (287.3KB, 500x500) When a woman is pregnant with a male fetus, male specific proteins synthesized from the Y chromosome can enter the mother's bloodstream and trigger an immune reaction.
With each successive pregnancy, the mother's immune system becomes more sensitive and produces anti-male antibodies that suppress and destroy proteins important in male brain development.
These antibodies can subtly disrupt the sexual differentiation in the fetal brain, increasing the likelihood of homosexual or effeminate traits in later-born sons.
Each successive male fetus increases the likelihood of the fetus turning out gay by 33%.