The source of estrogen during the second and third trimesters of pregnancy is the

Question

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[ $\mathrm{X}$ F 3]. During the second and third trimesters of pregnancy, the fetal adrenal gland synthesizes dehydroepiandrosterone-sulfate (DHEA-S), which is hydroxylated in the fetal liver and then transferred to the placenta, where it is aromatized to estrogen. In the first trimester, the corpus luteum is the source of both estrogen and progesterone.

The Source of Estrogen During the Second and Third Trimesters