A new study out of Brazil links early or late menstruation onset to health struggles later in life. How the timing of your first period can influence your risk of obesity, high blood pressure and ...

A first menstrual cycle usually occurs between the ages of 10 and 16 with the average age of a first period being 12.4 years old. That’s a pretty wide range, so how do you know when your kid needs ...

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.