define menstruation cycle??
Answers
Medical Definition of Menstrual cycle
Menstrual cycle: The monthly cycle of changes in the ovaries and the lining of the uterus (endometrium), starting with the preparation of an egg for fertilization. When the follicle of the prepared egg in the ovary breaks, it is released for fertilization and ovulation occurs. Unless pregnancy occurs, the cycle ends with the shedding of part of the endometrium, which is menstruation. Although it is actually the end of the physical cycle, the first day of menstrual bleeding is designated as "day 1" of the menstrual cycle in medical parlance.
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The menstrual cycle is the regular natural change that occurs in the female reproductive system(specifically the uterus and ovaries) that makes pregnancy possible.The cycle is required for the production of oocytes, and for the preparation of the uterus for pregnancy.The menstrual cycle occurs due to the rise and fall of estrogen.This cycle results in the thickening of the lining of the uterus, and the growth of an egg, (which is required for pregnancy). The egg is released from an ovary around day fourteen in the cycle; the thickened lining of the uterus provides nutrients to an embryo after implantation. If pregnancy does not occur, the lining is released in what is known as menstruation or a "period".
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