Sperm are male reproductive (sex) cells. The word "sperm" can refer to spermatozoon (singular) or spermatozoa (plural). Sperm are tiny cells with an oval-shaped body and a long tail. They measure just ...

Semen is a fluid that carries sperm, or male reproductive cells, out of the body during ejaculation. The average amount of ...

Kennedy Jr. has, historically, been very public about his concerns about what is plaguing the nation’s well-being. His long, complicated history with vaccines is well-documented. So is his ...

Add Yahoo as a preferred source to see more of our stories on Google. After struggling with infertility, these men sought out sperm donors to help them become dads. (Photo illustration: Yahoo News; ...

Just like urine and stool, semen can provide important clues about a man’s health. Variations in its color, texture, smell and volume can signal underlying health conditions. Understanding these signs ...

A semen analysis can help your doctor diagnose fertility issues. A sample is looked at under a microscope to see how many sperm cells it contains, how they're shaped, and how well they move. (Photo ...

This article was reviewed by Lynn Marie Morski, MD, JD. So, you’ve been told your swimmers are lacking a little bit. If you’re now wondering, Can a man recover from low sperm count?, the answer is ...