Menstrual Cycle |
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| Cycle, Endometrial; Cycle, Menstrual; Cycle, Ovarian; Cycles, Endometrial; Cycles, Menstrual; Cycles, Ovarian; Endometrial Cycles; Menstrual Cycles; Ovarian Cycles | |
| The period from onset of one menstrual bleeding (MENSTRUATION) to the next in an ovulating woman or female primate. The menstrual cycle is regulated by endocrine interactions of the HYPOTHALAMUS; the PITUITARY GLAND; the ovaries; and the genital tract. The menstrual cycle is divided by OVULATION into two phases. Based on the endocrine status of the OVARY, there is a FOLLICULAR PHASE and a LUTEAL PHASE. Based on the response in the ENDOMETRIUM, the menstrual cycle is divided into a proliferative and a secretory phase. | |