If Rh incompatibility has been diagnosed, your doctor will most likely recommend Rh immune globulin (RhoGAM) in your seventh month of pregnancy, and then again within 72 hours after delivery if your baby’s blood type is confirmed as Rh positive upon delivery. If this occurs, your baby might need a red blood cell transfusion either during your pregnancy or immediately after delivery. If there was an Rh incompatibility in a first pregnancy, and there’s an Rh incompatibility in second and other future pregnancies, these maternal antibodies can damage the baby’s red blood cells. But they can cause issues if you have a subsequent pregnancy and are carrying another child that is Rh+. These antibodies will not cause problems to an Rh+ baby during the first pregnancy. If there’s an Rh incompatibility and this happens, your body might produce Rh antibodies against Rh factor. If your doctor identifies a potential for Rh incompatibility, your pregnancy will be monitored closely for any related issues and may need extra care.Īlthough your blood and your baby’s blood typically do not mix during pregnancy, a minimal amount of your baby’s blood and your blood could come in contact with each other during delivery. That would indicate that your baby is Rh+. If you are Rh-, your doctor will test your blood again later in your pregnancy to see if you have formed antibodies against Rh factor. The mother’s body might form antibodies to attack the baby’s Rh+ red blood cells.Īt your first prenatal visit, your doctor will suggest a blood type and Rh factor screening. Blood cells from an Rh+ baby crossing its Rh- mother’s bloodstream might trigger an immune response. Rh factor can be a concern if the biological mother is Rh- and the baby is Rh+. The most common type is Rh positive.īeing Rh positive or negative typically does not affect your health, but it could affect your pregnancy. Rh factor is an inherited protein, so being Rh negative (-) or Rh positive (+) is determined by your parents. How does blood compatibility affect pregnancy?Ĭompatibility in blood group is only a concern for couples if a pregnancy is involved where both partners are the biological parents.
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