In the grand scheme of things, those tiny swimmers are nature's building blocks and the male contribution to human creation. They may look similar to tadpoles but their importance, obviously, goes ...

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 ...

According to research from a team at the University of Utah Health and the University of Nevada, Reno School of Medicine, ...

For decades, sperm were thought to become fully active the moment they entered the female reproductive tract. New research suggests otherwise. A temperature-sensitive switch inside sperm cells may ...

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 ...

Video of a new mathematical model that predicts that mammalian sperm cells have two distinct swimming modes. This prediction opens new questions about potential connections between sperm cells’ motor ...

A number of factors can play a decisive role in some couples' inability to conceive, which may lead them to turn to fertility treatments like IVF or IUI. But before couples get to that point, they ...

Dental cavities and routine dental care can make parents planning a pregnancy feel uneasy. You might be concerned about whether infections, X-rays, or dental medications could affect semen quality.