Why does menstruation occur? Describe the menstrual cycle in human females (or women).
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Menstruation occurs in cycles. The ovaries prepare an egg (oocyte) for release and the womb (uterus) prepares a lining to nourish the egg if it is fertilised. When the egg is not fertilised, the lining of the womb is shed and a woman gets her period (menstrual bleeding).
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_@ishu13191 _
When the egg produced by the ovary does not get fertilised the fertilised egg with the thickened lining of uterus are shed off. This cause bleeding in womens,It occurs once in 25-30days
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