Erythropoietin is inhibited by -: (A) Estrogen, (B) Progesterone, (C) Thyroxine, (D) Testosterone
Answer is A. Ans. is 'a' i.e., Estrogen o Estrogen antagonizes the erythropoietin-augmenting effect of placental lactogen. It inhibits utilization of erythropoietin by the marrow stem cell, and also impairs its production.