There are all sorts of old wives' tales about how to influence the biological sex of your unborn baby. Eat red meat for a boy, chocolate for a girl. But while science is starting to give parents the chance to pick sex, there's no sure way to pick a baby's gender. Wait -- they're not the same thing?
WHAT'S INSIDE: SEXUAL HEALTH
- Male Reproductive System
- Female Reproductive System
- Sexual Dysfunction
As science advanced from philosophy to empirical knowledge, groundbreaking discoveries -- like the five on this list -- revealed a lot about the reproductive equipment inside human bodies. Which revolutionized our understanding of sex the most?
Lots of rumors go around about Viagra, but what does this medicine actually do inside the body? Take the Viagra Quiz to see what you know about that little blue pill.