what is mesturation and what happened in girls during this and when it starts
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Answer: lf fertilization does not occur,the released egg ,and the thickened lining of the uterus along with its blood vessels are shed off.This causes bleeding in women which is called menstruation.mensuration occurs once in about 28 to 30 days.The first menstrual flow begins at puberty termed as menarche.
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Menstruation is bleeding from the vagina that happens about once a month, as a normal part of the menstrual cycle. It is also known as having a period. During this cycle, your hormones make the lining of the uterus become thicker, getting ready in case of pregnancy.
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