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Question

Intensely lactating mothers do not commonly conceive due to:


A

The suppression of fertilisation

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B

The suppression of gonadotropins

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C

The suppression of gametic transport

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D

The hypersecretion of gonadotropins

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Solution

The correct option is B

The suppression of gonadotropins


The correct option is B.

Explanation of the correct option: -

  1. The presence of prolactin hormone in the blood of nursing women reduces the pituitary gland's release of gonadotropins (FSH and LH).
  2. Ovulation cannot take place without the presence of gonadotropins.
  3. As a result, in the absence of gonadotropins, the ovum does not release, and the odds of fertilisation are negligible during the first 6 months after parturition (if the mother is regularly breastfeeding).
  4. Thereby leading that most breastfeeding mothers being unable to conceive. part of a primary meristem that contains actively dividing, undifferentiated, isodiametric thin-walled cells, as well as their most recent descendants.

Explanations of the incorrect options: -

Option A: - When conditions are bad, delaying or limiting reproductive activity appears to be an adaptive reaction to maximise reproductive success across the lifespan. In many social mammals, dominant females use aggressiveness and infanticide to prevent subordinate females from reproducing.

Option C: - Fertilization happens in the oviduct's ampullar area. Spermatozoa are carried upward from the vaginal canal to the ampulla (eg., in primates and ruminants).

Option D: - Absent menstrual periods, infertility, vaginal dryness, and the loss of some feminine features are all symptoms of hyposecretion of gonadotropins in premenopausal women.

Final Answer: - Intensely lactating mothers do not commonly conceive due to the suppression of gonadotropins.


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