A recent Trump executive order defines sex based on gamete size. But the order oversimplifies genetics, hormones and reproductive biology.

The U.S. Department of Health and Human Services (HHS) announced a significant policy shift Wednesday, releasing official ...

This is the beginning of a reintroduction program that will repatriate bison to territories across the U.S.,' said Director ...

The U.S. Department of Health and Human Services issued guidance updating its official definitions of terms such as sex, ...