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Human Reproduction — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYHuman Reproduction1 Mark
MCQ
Onset of menstruation is due to:
  • A
    Fall in level of progesterone
  • B
    Increase in level of progesterone
  • C
    Increase in level of FSH
  • D
    None of these
✓

Answer

  1. Fall in level of progesterone

Explanation:

The uterine lining dies due to the deficiency or reduced level of progesterone in blood and is sloughed off.

Blood vessels rupture, causing bleeding.

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