Menstrual Cycle: human females menstruation,Human Reproduction family planning stage | Menstrual Cycle: The reproductive cycle in the female primates (e.g, monkeys, apes andi human beings) is called menstrual cycle.    The first menstruation begins at puberty and is called menarche.  In human females, menstruation is repeated at an average interval of about 28/29 days, and the cycle of events starting from one menstruation till the next […]

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