Erythroposis stas in fetal liver during ?
**Core Concept**
Erythropoiesis is the process by which red blood cells are produced, and it occurs in different sites during fetal development due to the **hematopoietic** needs of the growing fetus. The **fetal liver** plays a crucial role in this process.
**Why the Correct Answer is Right**
The correct answer is related to the timeline of fetal development, specifically when the liver takes over as the primary site of erythropoiesis. This transition occurs after the **yolk sac** and before the bone marrow becomes the definitive site for blood cell production.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because erythropoiesis starts in the yolk sac before transitioning to the liver.
**Option B:** This option is also incorrect as it does not accurately reflect the timeline of erythropoiesis in fetal development.
**Option D:** Similarly, this option does not correctly represent when erythropoiesis occurs in the fetal liver.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that erythropoiesis transitions through different organs as the fetus develops, reflecting the changing **hematopoietic demands** and the maturation of the fetus.
**Correct Answer:** C. 11-24 weeks