Which one of the following statements is incorrect about menstruation?

  • A
    At menopause in the female,there is especially abrupt increase in gonadotropic hormones
  • B
    The beginning of the cycle of menstruation is called menarche
  • C
    During normal menstruation about $40 \; ml$ blood is lost
  • D
    The menstrual fluid can easily clot

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