Erythroblastosis foetalis can be avoided by administering _________ to the mother immediately after the delivery of first child :

Options

A. Vitamins
B. Antibiotics
C. Anti-Rh antibodies
D. Rh-antigen

Answer

**Step-by-Step Solution:**

1. **Understanding Erythroblastosis Foetalis**: Erythroblastosis foetalis is a condition that occurs when an Rh-negative mother has an Rh-positive baby. The mother's immune system can produce antibodies against the Rh-positive blood cells of the baby, leading to hemolysis (destruction of red blood cells) in the fetus.

2. **Rh Factor Basics**: The Rh factor is a protein that can be present on the surface of red blood cells. Individuals with this protein are Rh-positive, while those without it are Rh-negative. This distinction is crucial in pregnancy.

3. **Mechanism of Erythroblastosis Foetalis**: During the delivery of the first child, some of the baby's Rh-positive blood may enter the mother's bloodstream. Since the mother is Rh-negative, her immune system recognizes the Rh-positive cells as foreign and starts producing antibodies against them.

4. **Consequences in Subsequent Pregnancies**: If the mother becomes pregnant again with another Rh-positive baby, the antibodies she produced during the first pregnancy can cross the placenta and attack the red blood cells of the second baby, causing anemia and other serious complications.

5. **Preventive Measure**: To prevent the formation of these antibodies, it is crucial to administer a specific treatment immediately after the delivery of the first child.

6. **Administering Anti-Rh Antibodies**: The correct preventive measure is to administer anti-Rh antibodies (commonly known as Rh immunoglobulin or RhoGAM) to the mother right after the delivery of her first Rh-positive child. This treatment prevents the mother's immune system from recognizing the Rh-positive cells and forming antibodies against them.

7. **Conclusion**: Therefore, the answer to the question is that erythroblastosis foetalis can be avoided by administering **anti-Rh antibodies** to the mother immediately after the delivery of the first child.

---