Estrogen is secreted by the ______.

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Multiple Choice

Estrogen is secreted by the ______.

Explanation:
Estrogen is produced within the ovarian follicles, specifically by the granulosa cells of developing follicles. These cells convert androgens into estrogen under the influence of FSH, and this estrogen surge drives endometrial proliferation during the follicular phase. After ovulation, the corpus luteum mainly secretes progesterone, with only small amounts of estrogen, so the follicles remain the primary estrogen source. The endometrium itself does not secrete estrogen. This is why the best answer is the follicles.

Estrogen is produced within the ovarian follicles, specifically by the granulosa cells of developing follicles. These cells convert androgens into estrogen under the influence of FSH, and this estrogen surge drives endometrial proliferation during the follicular phase. After ovulation, the corpus luteum mainly secretes progesterone, with only small amounts of estrogen, so the follicles remain the primary estrogen source. The endometrium itself does not secrete estrogen. This is why the best answer is the follicles.

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