Question

Assertion :Generally, a woman does not conceive during the lactation period. Reason: The hormone 'prolactin' initiates and maintains lactation in a postpartum woman.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

Lactational amenorrhea is the absence of menstruation. It is a method of contraception based on the fact, that ovulation and therefore the menstrual cycle do not occur during the period of intense lactation following parturition. Therefore, as long as the mother breastfeeds the child fully, chances of conception are almost nil.
Prolactin hormone stimulates lactation (milk production) and has a direct effect on the breasts immediately after parturition (childbirth). The blood level of prolactin is stimulated by prolactin releasing hormone (PRH) released from the hypothalamus and it is lowered by prolactin-inhibitin hormone (PIH, dopamine) and by an increased blood level of prolactin. After birth, suckling stimulates prolactin secretion and lactation. The resultant high blood level is a factor in reducing the incidence of conception during lactation. Prolactin together with oestrogens, corticosteroids, insulin and thyroxine are involved in initiating and maintaining lactation.

So, the correct answer is option B.