... irth of the F emale B rain glanced at their mothers’ faces. They frequently touched the forbid-den toy cow, even though their mothers shouted, “No!” The one- year-old boys, driven by their testosterone-formed ... morning the sisters climbed on each other’s dressers to get to the clothes hanging in their closets. One girl had a pink two-piece outfit, and the other had a green two-piece outfit. Their mother ... sustaining mist of life; energizing; father and mother of testos - terone and estrogen, nicknamed the mother hormone,” the Zeus and Hera of hormones; robustly present in youth, wanes to nothing...