Sperm cells are made in the testicles and carry the father's genetic material. A sperm cell has a head, neck, and tail to help it reach and fertilize the egg. Around 300 million sperm are released ...

Researchers often use a nematode worm called Caenorhabditis elegans (C. elegans) to study human genetics because at the molecular level, we have a lot in common with these organisms. Scientists used a ...

A hidden form of evolution inside aging sperm may quietly raise genetic risks for the next generation. Credit: Shutterstock Harmful genetic mutations in sperm become much more common as men grow older ...

Research into how a father’s choices — such as diet, exercise, stress, nicotine use — may transfer traits to his children has become impossible to ignore. The standard sperm-meets-egg story posits ...

Scientists have identified a protein that may be key to proper sperm formation. Without it, male mice produced no viable sperm, they found. A team at the RIKEN Center for Biosystems Dynamics Research ...

While whiskey, real estate portfolios and emotional intelligence tend to improve with age, sperm does not. New research suggests that your spunk does indeed sour with time — at least in terms of how ...

Groundbreaking research shows that as men age, harmful genetic mutations in sperm become more common—not just from random chance, but because some are naturally favored. Advanced sequencing revealed ...

Once a sperm has broken through to an egg cell in order to fertilize it, the two cells need to hold together tightly. This occurs via a type of protein binding that is among the strongest in ...

Work described in this story was made possible in part by federal funding supported by taxpayers. At Harvard Medical School, the future of efforts like this — done in service to humanity — now hangs ...

Sperm changes with age – and not just in number or speed. As men get older, there’s a deeper shift happening in their DNA, one that affects what their children might inherit beyond eye color or height ...