NEET 2012 Biology question

In a normal pregnant woman, the amount of total gonadotropin activity was assessed. The result expected was

(1)High level of circulating HCG to stimulate estrogen and progesterone synthesisCorrect
(2)High level of circulating FSH and LH in the uterus to stimulate implantation of the embryo
(3)High level of circulating HCG to stimulate endometrial thickening
(4)High levels of FSH and LH in uterus to stimulate endometrial thickening

Answer: (1)

Solution

During pregnancy the placenta secretes human chorionic gonadotropin (hCG), which rises to a high level in the blood in early pregnancy. hCG maintains the corpus luteum and stimulates it (and later the placenta) to synthesise oestrogen and progesterone, which maintain the endometrium and the pregnancy. Pregnancy tests

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Question ID VK-091205