Not if first preg.: Rh sensitization usually occurs after delivery of a child who is Rh +, and mom is -. Fetal blood may mix with maternal blood. If not given Rhogam (antibodies against Rh + blood) her immune system will be sensitized to Rh+. Fathers who are Rh+ may be carriers of Rh - , with 50% chance of an Rh - infant with no risk. Even if sensitized, fetal therapy can allow survival of an Rh + baby.
Answered 7/5/2015
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