Add Yahoo as a preferred source to see more of our stories on Google. Close up of a man's open palm as he pours out two Viagra pills from a pill bottle. By studying male mice's erections, scientists ...

Erectile disorder (ED) refers to a persistent difficulty achieving or maintaining an erection sufficient for satisfying sexual activity. It affects millions of men worldwide, including up to 1 in 4 in ...

Although the cells are also abundant in the human penis, their crucial role in erections was previously unknown, according to a new study published Thursday (Feb. 8) in the journal Science. Changing ...