Add Yahoo as a preferred source to see more of our stories on Google. A new study out of Brazil links early or late menstruation onset to health struggles later in life. How the timing of your first ...

Your best friend, Julia, has it. Even Karen, the 10-year-old down the street, has it. So why don't you have your period yet? A girl's period, also known as menstruation, begins after she has reached ...

The first period can be overwhelming. Here are some of the simple menstruation tips that will help you feel prepared to deal with it.

Your period could be crampin’ your style — and your future health. Girls are reaching puberty faster than previous generations, a phenomenon perplexing researchers. The average age of the start of ...