Paterna Biosciences says it has determined the set of instructions needed to turn sperm-making stem cells into "normal, ...

Paterna Biosciences said it has mastered the molecular signals that teach stem cells how to mature into sperm for a promising ...

For all of human history, reproduction has relied on a simple biological formula. Sperm meets egg. They fuse, they divide, ...

Scientists have tried for decades to produce human sperm outside the body. A Salt Lake City company says they’ve succeeded – ...