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How is menstruation related to preparation of the uterus and the absence of pregnancy?

Answer and explanation

Correct answer: If pregnancy does not occur, the prepared inner lining of the uterus breaks down and is shed

The uterine lining thickens during the cycle in preparation for a possible pregnancy. If pregnancy does not occur, hormonal changes cause this lining to break down and leave the body as menstrual flow.

Related tags

MenstruationUterusReproductive CycleReproductionWorld Of LivingScienceClass 10 Mcq

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