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Human Reproduction question

2009 · Q65
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Human Reproduction question

2009 · Q65

NEETBiologyHuman ReproductionMCQ+4 / −1
Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female ?
  1. A
    Retention of well-developed corpus luteum
  2. B
    Maintenance of high concentration of sexhormones in the blood stream
  3. C
    Maintenance of the hypertrophical endometrial lining
  4. D
    Fertilization of the ovum
View written solutionFree

Correct answer: B

High concentration of sex steroids (estrogen) exerts negative feedback on anterior pituitary, decreasing LH secretion and release thus, lowering LH level in blood. Due to insufficient LH level no ovulation occurs which causes irregular menstruation.

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