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

The Trump HHS defined "sex" as "a person's immutable biological classification as either male or female" based on reproductive sex cells.

While it is a common practice to keep laptops on thighs while working, research has shown that it can lower sperm count in ...

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

The executive order and the new HHS document provide similar narrow definitions of words like “sex,” “female,” “woman,” “girl ...