How a sperm and an egg fuse together has long been a mystery. New research by scientists in Austria provides tantalizing clues, showing fertilization works like a lock and key across the animal ...

After the egg has been fertilized by a sperm, the surrounding egg coat tightens, mechanically preventing the entry of additional sperm and the ensuing death of the embryo, a new study finds. The work ...

This week, 60 Minutes reported on egg freezing: a medical procedure in which a woman's eggs are harvested, frozen and stored until she is ready to have children. Correspondent Lesley Stahl visited a ...

Egg freezing, revolutionized by vitrification, offers women a real option to preserve fertility. While technology has ...