Around half of teenage girls experience moderate to severe period pain. The mechanical force of the uterus contracting and inflammatory chemicals such as prostaglandins contribute to this pain.

Menstruation is a natural biological process experienced by nearly half the global population. Yet, for many girls, the first period arrives as a surprise—often misunderstood, feared, or even ...

Add Yahoo as a preferred source to see more of our stories on Google. A new study of 71,341 women supports the growing concern that the age at which girls start menstruating is getting younger, and ...

It doesn't have to be awkward.

Girls in the United States have been getting their periods at younger ages over the last fifty years, with additional variation among races, according to a new study. The study published in the JAMA ...

Girls are getting their first periods at a younger age, according to a new study. Research conducted by Harvard University's public health school found that, in the US, the time of a person's first ...

Girls who grow up eating a healthier diet than their peers may be less likely to get their first menstrual periods at an earlier age — regardless of height or body mass index — a new study suggests.