Space is big, empty, and apparently very confusing if you’re a sperm cell. According to a new study from the University of ...

Learn how microgravity could affect sperm, fertilization, and embryonic development in space.

A new study identifies the defective function of CatSper, an ion channel controlling calcium levels in sperm, as a common cause of seemingly unexplained male infertility. CatSper-deficient human sperm ...

Add Yahoo as a preferred source to see more of our stories on Google. We often imagine sperm as swimmers, tiny cells whipping their tails to power through fluid on a mission toward the egg. However, a ...

WASHINGTON - As humankind moves toward the goal of establishing a long-term presence on the moon and Mars, the question of ...

Scientists warn that storage may cause sperm to lose quality over time, raising new concerns about fertility and conception ...

Another hurdle has emerged that must be overcome for long-term space habitation and the colonization of Mars. On the 26th (local time), a team led by Professor Nicole McPherson from the University of ...

In mammals - including us humans - sperm are surprisingly picky about temperature, thriving best in conditions a few degrees cooler than normal body temperature. But, given that the female ...

What sperm can tell us about a man's overall health — and how it affects pregnancy, maternal health and more. (Photo illustration: Yahoo News; photos: Getty Images) For centuries, women were usually ...