"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." For most uterus owners, periods are a monthly occurrence as regular—and annoying!—as rent. And between ...

Implantation is a crucial step in early pregnancy, and it can only happen if the uterine lining is healthy and receptive.

We now have the most detailed map ever made of the endometrium, or the inner lining of the uterus. This will significantly improve our understanding of reproductive health and common conditions such ...