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 ...

Most men know stress can affect the libido. But they don’t realize stress may also affect sperm health. Here’s what men can ...

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 ...

Sperm whales have a lot to say. The animals spend much of their lives in darkness, searching the ocean's depths for giant squid. So sound rules their world, especially in their tight-knit family ...

This article was reviewed by Darragh O’Carroll, MD. A vasectomy is a popular form of birth control for men. The procedure is simple. It blocks the tubes that let sperm mix with semen, so sperm can’t ...

What’s one thing most Americans likely don’t know? Demand for donor sperm is increasing. Initially established in the 1970s to help men undergoing vasectomies and facing cancer treatments, sperm banks ...