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Select the correct option describing gonadotropin activity in a normal pregnant female:

1. High level of FSH and LH stimulates the thickening of endometrium.
2. High level of FSH and LH facilitate implantation of the embryo.
3. High level of hCG stimulates the synthesis of estrogen and progesterone.
4. High level of hCG stimulates the thickening of endometrium.

Correct answer: High level of hCG stimulates the synthesis of estrogen and progesterone.

Solution

In normal pregnancy, hCG from the embryo/placenta maintains the corpus luteum, which continues producing estrogen and progesterone. These hormones sustain the uterine lining and support pregnancy.

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