noun, Psychiatry. 1. an inability to speak, due to a physical defect, conscious refusal, or psychogenic inhibition. Origin of mutism.
1 A new study finds girls are developing breasts earlier than ever before; American boys and girls are entering puberty about five years younger than they did in 1920.
Menstruation, more commonly known as a period, is a major stage of puberty for girls at the average age of 13. It took researchers over 10 years to analyze and observe data from 1.3 million women between the ages of 50 to 64, in order to figure out how their first period age could affect their health.