NEET BIOLOGY

Detailed explanation-1: -Erythroblastosis fetalis results from Rh incompatibility, which may develop when a women with Rh negative blood is imprenated by a man with Rh positive blood, and conceives a fetus with Rh positive blood.

Detailed explanation-2: -Erythroblastosis fetalis classically results from Rho(D) incompatibility, which may develop when a woman with Rh-negative blood is impregnated by a man with Rh-positive blood and conceives a fetus with Rh-positive blood, sometimes resulting in hemolysis.

Detailed explanation-3: -The mother’s body makes antibodies against the fetal blood cells. These antibodies may cross back through the placenta into the developing baby. They destroy the baby’s circulating red blood cells.

Detailed explanation-4: -If the father’s blood type is Rh negative, no further testing is needed. However, if the father’s blood type is Rh positive or their blood type isn’t known, your blood may be tested again between 18 to 20 weeks of pregnancy, and again at 26 to 27 weeks. You’ll also receive treatment to prevent erythroblastosis fetalis.

Detailed explanation-5: -If a father’s Rh factor genes are + +, and the mother’s are + +, the baby will have one + from the father and one + gene from the mother. The baby will be + + Rh positive. If a father’s Rh factor genes are + +, and the mother’s are–, the baby will have one + from the father and one-gene from the mother.