Once we start to assume that women have fundamentally different bodies from men, this quickly raises the question of how far the gaps stretch. Do sex chromosomes affect not just our health but all aspects of our bodies and minds, for example? If every cell is affected by sex, does that include brain cells? Do estrogen and progesterone not just prepare a woman for pregnancy and boost her immunity but also creep into her brain, affecting how she thinks and behaves? And does this mean that gender stereotypes, such as baby girls preferring dolls and the color pink, are in fact rooted in biology?
