Hemolysis in pregnant women with blood type O is an immune reaction resulting from the incompatibility of the mother’s and child’s blood types. If hemolysis occurs in utero, it can seriously lead to stillbirth; if hemolysis occurs after the baby is born, it can lead to neonatal hemolysis, which manifests as premature jaundice.
However, not all mother-child blood type incompatibility will cause hemolysis, and the incidence of pregnant women with blood type O is 2-2.5%. Neonatal hemolysis may occur when the mother is blood type O and the father is blood type A, B, and especially blood type AB.
Once a newborn is diagnosed with neonatal hemolysis, it is important to treat it as early as possible and never delay.
Although the incidence is not high, pregnant women must undergo regular obstetric examinations and be screened as early as possible after birth.