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 ...

LONDON -- British scientists claimed Wednesday to have created human sperm from embryonic stem cells for the first time, an accomplishment they say may someday help infertile men father children. The ...

In human cells, DNA carries chemical or "epigenetic" marks that decide how genes will be used in different tissues. Yet in a ...

Sperm cells have a monumental task, but their days are numbered. From the moment they're made in the testes to the time they may spend winding their way up the labyrinthine of the female reproductive ...

A new study shows that lab-grown sperm cells can be derived from stem cells. July 9, 2009 — -- The face of infertility-- in literature, in the media, in advocacy groups -- is so predominantly ...

In one of the most surprising innovations in medical technology, scientists have created tiny, remote-controlled “sperm-bots” that could one day swim through the human body to deliver drugs, diagnose ...

Human sperm can swim through surprisingly viscous fluids with ease – and they seemingly defy Newton's third law of motion to do so. To figure out how they slither through substances that should, in ...

Sperm have to wiggle vigorously to reach an egg, and that motion is key to a clever new fertility test. The technique, tested with bull semen and detailed in Advanced Materials Interfaces, harnesses ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) More than 1,200 Bridgeport high school seniors celebrated graduation Friday during a ...