what is menstrual cycle?
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In which the ovum of a woman is coming out from her vegina is called menstrual cycle
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If the egg is not fertilised it live about one day. Since ovary releases one egg every month the uterus also prepare itself for recieving every egg. This its line become thick and spongy. This would require for nourishing the embryo if fertilisation had taken place. Noe however the lining is not needed any longer, it slowly breaks abs comes through vagaina as blood and mucous. This cycle takes place roughly every month and known as menstrual cycle
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