It's not the first time a lawmaker has attempted to regulate male reproduction. Nina Turner, former Ohio state senator, ...

These embryos do not survive naturally, since in mammals every embryo has to derive from a male gamete (sperm) and a female ...

Although scientists once theorized that all embryos start developing as females, recent research suggests that neither sex is "default." Legal experts told PolitiFact they see no basis for the claim ...

It’s a new way to create “bi-paternal” mice that can survive to adulthood—but human applications are still a long way off.

Researchers created the first bi-paternal mouse by modifying imprinting genes, advancing reproductive science but facing ...

That longtime practice is changing, thanks to new technology that enables hatcheries to quickly peer into millions of fertilized eggs and spot male embryos, then grind them up for other uses ...