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

1. High level of circulating FSH and LH in the uterus to stimulate implantation of the embryo
2. High level of circulating HCG to stimulate endometrial thickening
3. High level of FSH and LH in uterus to stimulate endometrial thickening
4. High level of circulating HCG to stimulate estrogen and progesterone synthesis

Correct answer: High level of circulating HCG to stimulate estrogen and progesterone synthesis

Solution

In normal pregnancy, hCG rises markedly and acts like LH to maintain the corpus luteum. This keeps estrogen and progesterone levels high, which supports the endometrium and pregnancy.

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