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 ...

We all know the drill for reproduction—sperm meets egg. But mice aren’t people. And the same recipe doesn’t work for human reproductive cells. One reason, according to Dr. Mitinori Saitou at Kyoto ...

The day when human sperm and eggs can be grown in the laboratory has inched a step closer, with the discovery of a way to recreate a crucial developmental step in a dish 1. “Epigenetic reprogramming ...

CHICAGO (Reuters) - U.S. researchers have found a way to coax human embryonic stem cells to turn into the types of cells that make eggs and sperm, shedding light on a stage of early human development ...

Scientists are exploring ways to mimic the origins of human life without two fundamental components: sperm and egg. They are coaxing clusters of stem cells – programmable cells that can transform into ...

The sperm is not a passive supplier of genetic material to the egg. A study from Linköping University, Sweden, shows that ...

Jaiwen Hsu was an active 11-year-old when he developed pain in his left knee that forced him to sit out a few soccer games. What his parents thought was a sports injury turned out to be osteosarcoma, ...

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 ...

New research shows it's possible to reprogram skin cells into eggs that can be fertilized in the lab, though it's just a proof of concept for now. Reading time 3 minutes A team of scientists has ...

PORTLAND, Ore. — Oregon Health and Science University has published new research that could represent a game-changer for fertility treatments. At the same time, an anti-abortion group is raising ...

Almost every type of human cell is powered by mitochondria, bean-shaped organelles that use oxygen to synthesize usable energy.* These structures evolved billions of years ago from free-swimming ...