Siklus ménstruasi
Siklus ménstruasi nyaéta kecap ilmiah kanggo robahan psikologis nu bisa kajadian dina bikang kanggo kaperyogian réproduksi seksual jeung robahan. Artikel ieu berfokus dina siklus ménstruasi dina manusa.

Siklus ménstruasi, di bawah kontrol of the endocrine system, is necessary for reproduction. It is commonly divided into three phases: the follicular phase, ovulation, and the luteal phase; although some sources use a different set of phases: menstruation, proliferative phase, and secretory phase. Menstrual cycles are counted from the first day of menstrual bleeding. Hormonal contraception interferes with the normal hormonal changes with the aim of preventing reproduction.

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