Custer Semen, South African Woman Runner

During early fetal development, embryos of both sexes appear gender-neutral; the release of hormones is what changes physical appearance male or female. As in cases without two sexes, such as species that reproduce asexually, the gender-neutral appearance is closer to female than to male.
Culture and gender roles
In many prehistoric cultures, women assumed a particular cultural role. In hunter-gatherer societies, women were generally the gatherers of plant foods, small animal foods, fish, and learned to use dairy products, while men hunted meat from large animals. Other antropologists however have suggested that women only began to follow this behaviour after permanent settlement had been made, thus making these gender roles a result of civilisation rather than evolution.