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.

SAN FRANCISCO—A grandfather’s exposure to endocrine-disrupting chemicals may impact the age when his granddaughter starts her first period, according to preliminary data being presented Sunday at ENDO ...

There is unexpectedly large variation in height growth in girls after their first period. Every second girl grows either more or less in length than the 6-8 centimeters that is considered standard.

If you purchase an independently reviewed product or service through a link on our website, SheKnows may receive an affiliate commission. “Red Drop was started out of my classroom,” Roberts, then a ...