Multiple choice Which hormone has an inhibitory effect on erythropoiesis? Androgen Estrogen Erythropoietin Thyroxine Cortisol Reveal answer Fill a bubble to check yourself B Correct answer Explanation Estrogens have inhibitory effect on erythropoiesis through suppression of erythropoietin production. Estrogen is the main sex hormone in women, and is essential to the menstrual cycle.