Researchers at Newcastle University in England report they have coaxed the first human sperm cells from embryonic stem cells, in a remarkable demonstration of how quickly the field of stem-cell ...

Male fertility rates have been plummeting over the past half-century. An analysis from 1992 noted a steady decrease in sperm counts and quality since the 1940s. A more recent study found that male ...

It's a myth that sperm die upon contact with oxygen. In fact, their resilience might surprise you. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works ...