Question

(a) What name is given to the onset of menstruation in human females (or girls) ? At what age does this occur ?

(b) What name is given to the permanent stoppage of menstruation in women ? At what age does this occur ?

Answer 1

a-Menarche is the name given to the first menstrual period, which usually occurs between the ages of 11 and 16.(puberty)

b-
The average age of menopause in the United States is about 51. About one out of twenty women have late menopause (after age 55) while another 5% stop having periods between the ages of 40 and 45 (early menopause). The age of menopause is reduced by two years in women who smoke.