A team led by University of Osaka researchers has developed a technique to generate testes from mouse embryonic stem cells ...

Male infertility is a major issue worldwide and its causes remain unclear. Now, an international team of researchers led by Hiroki Shibuya at the RIKEN Center for Biosystems Dynamics Research (BDR) in ...

Add Yahoo as a preferred source to see more of our stories on Google. We often imagine sperm as swimmers, tiny cells whipping their tails to power through fluid on a mission toward the egg. However, a ...

Human sperm have long been a subject of fascination—not just for their role in fertilization, but for their remarkable ability to navigate through some of the most viscous environments in the body.

Katsuhiko Hayashi, a developmental geneticist at Osaka University, is working on ways to make what he calls "artificial" eggs and sperm from any cell in the human body. (Kosuke Okahara for NPR) ...