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 ...

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; ...

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 ...

(CNN) — In my clinic, one of the first things I hear from men facing a fertility issue is often the same: “I didn’t know I could be the problem. Help me, Doc.” I’ve seen the entire spectrum — couples ...

Sixteen years after doctors froze part of a boy’s testicle before chemotherapy, the tissue has helped him produce sperm as an ...

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 ...