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Que. - What is mensturation?....
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Menstruation is the period which starts from adolescence and stays till the age of 45.
This phase repeats every 28 days.
In this phase the female develops a unfertilised egg for fertilisation. After the period of 28 days the blood sheath wall formed in the lining of the uterus breaks down and the blood along with the unfertilised egg passes out of the vagina to the outside of the body. This period is called menstruation period and the process is called menstruation.
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