This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidneys and Body Fluids, Subject name: Physiology
[{'content': 'Feta] erythropoietin production is inhibited by? \nSelect and explain. \nA. Testosterone, B. Estrogen, C. Cortisol, D. Hypoxia', 'role': 'user'}, {'content': "Answer: B \nExplanation: ANSWER: (B) EstrogenREF: William's 23rd ed chapter 4, Guyton physiology 12th ed page 932ERYTHROPOIESISThis process is controlled primarily by fetal erythropoietin because maternal erythropoietin does not cross the placenta. Fetal erythropoietin production is influenced by testosterone, estrogen, prostaglandins, thyroid hormone, and lipoproteins. After birth, erythropoietin normally may not be detectable for up to 3 months.Factors influencing erythropoietin productionIncreaseDecreaseTestosteroneThyroid hormonesCorticotropinProlactinProstaglandins A2, El, and E2 enhance erythropoiesis by augmenting the renal cortical release of erythropoietinEstrogenProstaglandins F2aLipoproteinTumor necrosis factorInterleukin 1", 'role': 'assistant'}]