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18 August, 18:05

Why does menstruation happen?

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  1. 18 August, 18:12
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    During that, menstruation stops because the blood came from the uterus protect it and give nourish to the fertilized egg. It usually happen because a sperm cell meet it. When menstruation happens, it develop an egg cell and carried out with the lining of the uterus called the endumetrium because it dies.
  2. 18 August, 18:26
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    The menstrual cycle occurs due to the rise and fall of hormones
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