During second trimester of pregnancy, erythropoiesis occurs in the fetus primarily in?: (A) Liver, (B) Spleen, (C) Red bone marrow, (D) Lymph nodes
Answer is A. Ans. (a) LiverSites of HaematopoiesisYolk sac at 2 weeksEarliest Hemoglobin to be formed isGower 1. This is followed by Gower 2 and finally Portland.In fetus in liver and partly spleen.HbF appears at 14 weeksAt birth it shifts to the bone marrowHbA appears at 38 weeksMISCELLANEOUS