Medically reviewed by Peter Weiss, MD The start of your period is the beginning of the menstrual cycle, which typically lasts ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Let’s take a mental trip back to seventh-grade health class. When you got to the unit on menstruation, ...

The most comprehensive map of the human endometrium, the inner lining of the uterus, has been created, uncovering diverse cell types and detailing the dynamic changes these go through during the ...