When both parents have the same blood group, it usually does not cause major health issues, but it can influence the baby's blood type. The key concern arises in cases of the Rh factor. If both parents are Rh-positive or Rh-negative, there is no risk. However, if the mother is Rh-negative and the baby inherits an Rh-positive factor from the father, it can lead to Rh incompatibility, which may require medical attention during pregnancy. Doctors may recommend blood tests and prenatal care to monit