Question

Assertion (A) : Lactational amenorrhoea is a natural method of contraception.
Reason (R) : Ovulation in mother generally does not occurs during intense lactation following parturition. Identify the correct option from the following

• (A) and (R) are true. (R) is correct explanation for (A).
• (A) and (R) are true. But R is not correct explanation for (A).
• (A) is true, but (R) is false.
• (A) is false, but (R) is true.

Hint:

Lactational Amenorrhoea Method (LAM) works because: \begin{itemize} \item High levels of prolactin (due to frequent suckling) inhibit GnRH. \item Suppressed GnRH leads to low LH and FSH. \item Low LH and FSH prevent ovarian follicle development and ovulation. \item No ovulation means no egg to be fertilized, thus preventing pregnancy. \end{itemize}

Answer 1

The Correct Option is A

Step 1: Analyze Assertion (A)
Assertion (A) states: "Lactational amenorrhoea is a natural method of contraception."
Lactational amenorrhea is a natural method of birth control that relies on the physiological changes in a woman's body during breastfeeding. It is indeed recognized as a method of contraception, provided certain conditions are met (e.g., intense, frequent breastfeeding, and the baby is less than 6 months old).
Therefore, Assertion (A) is True. Step 2: Analyze Reason (R)
Reason (R) states: "Ovulation in mother generally does not occurs during intense lactation following parturition."
Intense lactation (breastfeeding) leads to the sustained release of prolactin, a hormone that stimulates milk production. High levels of prolactin inhibit the secretion of gonadotropin-releasing hormone (GnRH) from the hypothalamus, which in turn suppresses the release of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) from the pituitary gland. LH and FSH are essential for ovarian follicle development and ovulation. Thus, ovulation is typically suppressed during periods of intense and exclusive breastfeeding. Therefore, Reason (R) is True. Step 3: Evaluate if Reason (R) is the correct explanation for Assertion (A)
The contraceptive effect of lactational amenorrhoea (Assertion A) is directly due to the suppression of ovulation during intense lactation (Reason R). Without ovulation, there is no egg to be fertilized, thereby preventing conception.
Therefore, Reason (R) is the correct explanation for Assertion (A). Step 4: Choose the correct option
Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation for Assertion (A). This corresponds to option (1).