Can a Rh positive mother and a Rh positive father have a RH negative baby?
James Olson
Updated on May 09, 2026
Simply so, can an Rh positive mother have a baby with Rh negative?
If a mother is Rh-negative and a father is Rh-positive, the father can pass down his Rh-positive blood to the baby (if he's also negative, then there's no problem). That's often not an issue during a first pregnancy because the baby is usually born before the mother has had time to develop many Rh antibodies.
Secondly, can two positives make a negative baby? Only two negatives will produce a child with a negative type. But here is what is crucial to remember: A parent who has a positive-negative combination still can pass that negative gene to his or her children. Yes, Mom or Dad may be positive, but that recessive negative gene is still floating around in his or her DNA.
Similarly, do Rh positive mothers need RhoGAM?
According to the product website, "RhoGAM prevents the Rh-negative mother from making antibodies during her pregnancy. As long as the Rh-negative mother receives RhoGAM appropriately during every pregnancy, her babies are at very low risk of developing [anemia]."
Which blood types are not compatible for pregnancy?
Blood types are categorized by A, B, and O, and given an Rh factor of positive or negative. A-B-0 and Rh incompatibility happens when a mother's blood type conflicts with that of her newborn child. It is possible for a mother's red blood cells to cross into the placenta or fetus during pregnancy.