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The idealized cyclic changes in pituitary gonadotropins, estradiol (E2), progesterone (P), and uterine endometrium during the normal menstrual cycle.

The idealized cyclic changes in pituitary gonadotropins, estradiol (E<sub>2</sub>), progesterone (P), and uterine endometrium during the normal menstrual cycle.
The idealized cyclic changes in pituitary gonadotropins, estradiol (E<sub>2</sub>), progesterone (P), and uterine endometrium during the normal menstrual cycle.