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Question #45394
The Question
During the period of intense lactation following parturition, lactational amenorrhea serves as a natural contraceptive method. If a mother significantly reduces the frequency of breastfeeding, the contraceptive efficacy drops rapidly. Which of the following endocrine shifts is the primary physiological reason for the restoration of the ovulatory cycle?
Options
- A.
A drop in oxytocin levels removes the negative feedback on the anterior pituitary, allowing FSH and LH secretion.
- B.
A decrease in prolactin levels relieves the inhibition on the hypothalamus, restoring the pulsatile release of GnRH.
- C.
Reduced suckling stimulus directly stimulates the anterior pituitary to release a surge of Luteinizing Hormone (LH).
- D.
Lowered prolactin levels induce the regression of the corpus luteum, triggering a new menstrual cycle.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Regulatory_Failure
Understand how NOT, EXCEPT, and logical constraints are used to manipulate exam results.
Concepts Behind This Question
Colostrum|Prolactin|Oxytocin|FSH_LH
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often confuse the roles of Prolactin (milk synthesis and GnRH inhibition) and Oxytocin (milk ejection).
The trap tests the precise neuroendocrine reflex of lactational amenorrhea: it relies on Prolactin-mediated suppression of the hypothalamus-pituitary-gonadal axis.
Failing to distinguish between the hormones of lactation or misunderstanding the target of prolactin's negative feedback (Hypothalamus vs.
Ovaries) leads to selecting the distractors.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Human Reproduction - Class 12 |
| Concept | Colostrum vs. Mature Milk |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |