In the animal kingdom, pregnancy rarely follows the rules, with many species being pregnant for a year or more.

Not all animals are born small and helpless. Learn about the animals whose babies walk minutes after birth, including why and ...

I received a first-hand tutorial in whitetail deer gestation period just the other day. While hunting for morel mushrooms, I stumbled on a tiny fawn curled up in the downed top of an oak tree. I’ve ...

University of Cambridge scientists say they have identified a key pathway that controls the expansion of the placental vascular tree in late gestation, demonstrating that fetus-derived signals are ...