system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Haemoglobin first appears in which stage of erythropoiesis?
assistant
The correct answer is  Once the proerythroblast has been formed, it divides multiple times, eventually forming many mature RBCs. The first-generation cells are called basophil erythroblasts because they stain with basic dyes; the cell at this time has accumulated very little hemoglobin.