Add Yahoo as a preferred source to see more of our stories on Google. The first mice to be created from two fathers, a phenomenon known as androgenesis, have now produced healthy offspring for the ...

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

A Yale-led research team has uncovered how a naturally occurring biological mechanism found in mammals is able to prevent sperm cells from interacting with an egg, preventing fertilization. The ...