Egg fertilization is often described as an epic swim meet: Millions of sperm swim as fast as they can toward the egg until one — the fastest, strongest, healthiest sperm of them all — wins the race ...

This is an updated version of a story first published on May 4, 2025. The original video can be viewed here. Fertility rates in the United States are near historic lows. One reason is a sharp decline ...

In her new book "The Stronger Sex," science journalist Starre Vartan dispels myths and misconceptions about the female body. When you purchase through links on our site, we may earn an affiliate ...