EXPLAIN MENSTRUAL CYCLE
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The menstruation cycle refers to the cycles in which a woman's uterus grows and sheds a lining (the endometrium) which could support the development of a fertilised egg. It typically occurs in 28 day cycles, so a woman generally gets her period every 28 days
Stages :
The menstrual cycle is complex and controlled by many different glands and the hormones that these glands produce. The four phases of the menstrual cycle are menstruation, the follicular phase, ovulation and the luteal phase. Common menstrual problems include heavy or painful periods and premenstrual syndrome (PMS).
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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.[1][2] The cycle is required for the production of oocytes, and for the preparation of the uterus for pregnancy.[1] The menstrual cycle occurs due to the rise and fall of estrogen.[3] This cycle results in the thickening of the lining of the uterus, and the growth of an egg, (which is required for pregnancy).[3] 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.[3] If pregnancy does not occur, the lining is released in what is known as menstruation or a "period".[3]
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