You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Fetal erythropoeis is first occurs at what week of gestation ? and explain in detail?
Hematopoiesis stars in yolksac at 14 days of gestation. by 6 to 10 weeks erythropoesis occurs in liver. Textbook of obstetrics by sheipa balakrishnan,second edition, p.no:67