Pregnancy is often talked about as though it's a light switch. You're a regular person walking around and then a switch flips — presto, you're pregnant. The reality is more nuanced. "Sex ed really ...

The two main ways to get pregnant without having sex are with IUI and IVF. It's very rare to get accidentally pregnant without having penetrative sex.

Pregnancy doesn't begin the moment a sperm fertilizes an egg — it is a complex process that takes time and involves lots of luck.

Two embryos split to create two sets of identical twin quadruplets. April 12, 2011— -- "Babies, babies, babies." That's how Miranda and Josh Crawford now describe a typical day after their two ...

A corpus luteum is a mass of cells that forms in an ovary. It is a temporary organ that appears every menstrual cycle and disappears if fertilization does not occur. It also produces the hormone ...