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The menstrual cycle is the reproductive cycle in the female body which begins with onset of puberty. The ovary releases egg every month and uterus also prepares itself to receive the fertilized egg.The inner lining of uterus thickens but when the fertilized egg is not received that lining breaks. Hence it breaks down and is released in form of blood and mucus.This cycle occurs every month and is known as menstrual cycle

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