Menarche, the first menstruation, the typical manifestation of the genital cycle in higher primates is in the life of women a period which — although it is not identical with sexual maturity — is a certain culmination of the previous development of the genital apparatus and its regulatory mechanisms. It is preceded by growth acceleration and the development of secondary sex characteristics.
KeywordsEurope Testosterone Androgen Oestradiol Peri
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