Is sperm racing the next big thing? Well, it might not become an Olympic sport, but it's certainly creating quite the buzz.

Egg fertilization is often described as an epic swim meet: Millions of sperm swim as fast as they can toward the egg until ...

All new babies start as an egg and a sperm, but where do those two cells come from in the first place? Your reproductive organs produce the sex cells that make a baby. Sperm cells begin their life ...