WATCH: The Boston Bruins and Montreal Canadiens weren't trading Christmas cards in the first period of Tuesday's showdown at TD Garden.

Medically reviewed by Cordelia Nwankwo, MD Key Takeaways Breast development usually starts about two years before the first ...

Girls in the U.S. are getting their first period earlier than in decades past. Researchers say there are multiple factors causing early puberty, including obesity and environmental pollutants. Girls ...

Pregnancy is almost long enough for you to forget what having a period feels like. But rest assured, the first period postpartum will swoop in to remind you—potentially with a vengeance. Here's ...

Girls in the United States are getting their periods earlier, and it's taking longer for them to become regular, according to a study. The age at which women get their first period, known ...

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The timing of your first period offers important clues about your hormonal health and future fertility. Whether menarche occurs early or late, it may indicate underlying hormonal health, affecting ...

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 ...

Jessica Biel opens up about getting her first period and dealing with period shame. (Photo illustration: Yahoo News; photos: Noam Galai/Getty Images for KinderMed) Jessica Biel wants to get people ...

Meet Dr. Amber Robins, a medical doctor turned entrepreneur who is now the founder of Sanxtuary MD, a Black-owned brand committed to helping women learn about their bodies and manage their menstrual ...

The day I got my first period is permanently implanted in my brain. As every girl knows, one of the cruel aspects of mother nature is that you never really know when that first period is going to hit.