ZoologyThe main cause of the disintegration of the endometrial lining is

The main cause of the disintegration of the endometrial lining is

  1. A

    LH surge

  2. B

    degeneration of corpus luteum

  3. C

    ovulation during mid-cycle

  4. D

    implantation leads to pregnancy

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    Solution:

    Menstruation is shedding of the endometrial lining from uterus. This occurs due to decrease in levels of ovarian hormones - estrogen and progesterone. These hormones decrease because in the ovary the corpus luteum of previous cycle start disintegrating. Thus, degeneration of corpus luteum causes the ovarian hormones to decrease and thus endometrium degenerates leading to bleeding phase.

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