The average girl in the United States reaches _________, the time of her first menstrual period, sometime between the ages of 12 and 13.

Question

Quizplus · Accepted Answer

Menarche refers to the onset of menstruation, which usually occurs between the ages of 12 and 13 in girls in the United States. Spermarche refers to the first ejaculation in boys, which typically occurs around the age of 13. Puberty is a broader term that encompasses the hormonal and physical changes that occur during adolescence, including menarche and spermarche. Adrenarche is the maturation of the adrenal glands, which occurs earlier in childhood and is not directly related to menstruation.

The Average Girl in the United States Reaches _________, the Time