Not only that, the masculinizing effects of testosterone (androgens) make the gonads differentiate into testes and then they descend from the same place the differentiated gonads (ovaries) remain in females, the labia closes and becomes the scrotum (thats why males have a vertical line in their scrotum)...the clitoris enlarges and becomes the penis. Basically the same thing, even though they look so different. In the absence, or insensitivity, of testosterone, the male fetus will be born with a pussy.