They see a microscopic flash at fertilization, a burst of fluorescence that marks a sudden release of zinc from the human egg. Scientists call this burst the "zinc spark," and they now see it as a ...

Male infertility is a major issue worldwide and its causes remain unclear. Researchers at the RIKEN Center for Biosystems ...

In the quiet laboratories of Sheffield University, England, scientists have uncovered disturbing evidence about how lifestyle choices affect a man’s sperm. Their findings cast shadows over common ...