Sometimes a pregnant mother and her unborn baby have different Rh factors. This means that they have Rh incompatibility. It happens when the Rh protein factors vary. When the mother is Rh-negative, and her unborn baby is Rh-positive, it poses a problem. Rh incompatibility is actually a medical condition which occurs throughout a woman's pregnancy. A woman's blood type may not have a Rh factor, and her baby's blood type does, so incompatibility occurs. Just like a person's blood type, a person inherits their Rh factor from their parents. Most people have the positive Rh factor, but there are a few people who are Rh-negative. When you're Rh negative, it means you don't have the Rh protein.
During a woman's very first prenatal visit, she may have to take a Rh-blood test. The doctor would recommend this in order to check if the woman is Rh-positive or Rh-negative. If the woman has a Rh-negative blood type, the doctor may request to test the father's blood too. If the father is also Rh-negative, then there's no issue. However, if the father has a Rh-positive blood type, it may be an issue. There's a higher chance that the baby has this blood type too. In this case, there are different screening tests a doctor may perform. The doctor needs perform these tests to check if the mother and baby are at risk for Rh incompatibility.
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