All of the following statements concerning pr | vedclass

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(B) During pregnancy, high levels of estrogen and progesterone in the maternal circulation exert negative feedback on the pituitary gland, which inhib

Vedclass · Accepted Answer

the cyclic release of pituitary gonadotropins and ovarian steroids is continued.

Vedclass · Answer

(B) During pregnancy, high levels of estrogen and progesterone in the maternal circulation exert negative feedback on the pituitary gland, which inhibits the cyclic release of pituitary gonadotropins ($FSH$ and $LH$) and prevents the menstrual cycle.$hCG$ (human chorionic gonadotropin) is produced by the placenta, which maintains the corpus luteum of pregnancy and serves as the basis for pregnancy urine tests.Placental hormones, along with other maternal hormones, stimulate the development of mammary gland tissues (ducts and alveoli) to prepare for lactation.The corpus luteum of pregnancy secretes progesterone to maintain the endometrium until the placenta takes over this function.

Column $I$	Column $II$
$a$. Fully formed morula	$i$. By end of $7^{\text{th}}$ day after fertilization
$b$. Fully formed blastocyst	$ii$. $15$ days after fertilization
$c$. Completion of implantation process	$iii$. By end of $4^{\text{th}}$ day after fertilization
$d$. Fully formed gastrula	$iv$. By end of $10^{\text{th}}$ day after fertilization

All of the following statements concerning pregnancy are accurate $EXCEPT$

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