A: Lack of menstruation may be indicative of | vedclass

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(C) Assertion $(A)$ is correct because the absence of menstruation (amenorrhea) is one of the primary signs of pregnancy. During pregnancy,the corpus

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Assertion is correct,but Reason is incorrect.

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(C) Assertion $(A)$ is correct because the absence of menstruation (amenorrhea) is one of the primary signs of pregnancy. During pregnancy,the corpus luteum is maintained by human chorionic gonadotropin $(hCG)$,which continues to secrete progesterone,preventing the shedding of the endometrium.Reason $(R)$ is incorrect because menstruation occurs specifically when the released ovum is $NOT$ fertilized. If fertilization occurs,the corpus luteum persists and menstruation does not take place.

$A$: Lack of menstruation may be indicative of pregnancy.
$R$: Menstruation only occurs if the released ovum is fertilised.

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$A$: Lack of menstruation may be indicative of pregnancy.$R$: Menstruation only occurs if the released ovum is fertilised.