Add Yahoo as a preferred source to see more of our stories on Google. Ultrastructure expansion microscopy of murine male germ cells reveals the fine molecular structures of centrioles (shown in the ...

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 ...