Menarche
Puberty in the female as shown by the onset of menstruation. The age of the beginning of menstruation which heralds reproductive maturity in the female. It is characterized by development of secondary sexual characteristics. Its antithesis is the menopause which is the the age of cessation of menstruation.It is caused by another time related process called puberche. Puberche controls gonadache, thelarche and spermache (in the male).
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