Up to 6 weeks of gestation erythropoiesis occurs in?: (A) Yolk sac, (B) Bone marrow, (C) Spleen, (D) Liver
Answer is A. ANSWER: (A) Yolk sacREF: Guyton, 6th edition, page 420, Wintrobe s clinical hematology 12th ed page 90, William's hematology 8th ed chapter 6See details of fetal erythropoiesis in Physiology December 2011