Without medical intervention, all of your subsequent pregnancies are at risk of being self terminated by these antibodies. These antibodies will sit in wait for the next pregnancy and once the Rh-positive cells are recognized, the antibodies are programmed to attack. However, once an Rh-negative mother has been exposed or sensitized to her child's Rh-positive blood, the process of building a multiplying army of antibodies has began. Therefore, the first child would typically be unaffected. This causes the mother's immune system to shift into gear and begin producing antibodies that are specifically designed to find and destroy these foreign blood cells.ĭuring your first pregnancy, these antibodies are typically not dangerous, because chances are that you will not be exposed to your child's blood until delivery. When an Rh-negative mother is exposed to her Rh-positive baby's blood, the mother's body is at risk for becoming "sensitized". If you are pregnant and Rh-negative and are carrying a child that is Rh-positive, like the child's father your baby and future pregnancies can be at risk for a serious medical disease, birth defect or worse miscarriage and death. However, finding out your blood type and the compatibility of your mates is the most important. There are reasons why your doctor will test your blood during your pregnancy. For more on the Migration and Distribution of the Rh- Factor Blood Line, please click here. Since 85% of the US Population is Rh-positive (Rh+), it stands to reason that Rh-negative women are more likely to get pregnant by an Rh-positive mate.
Blood Type & Factor play an important role in pregnancy when an Rh-negative (Rh-) woman becomes pregnant with a man who is Rh-positive (Rh+). When you are Rh-negative it means that you do not have a protein called, The Rh Factor, named for the Rhesus Monkey protein or the D antigen, on the surface of your red blood cells. The Rh-negative (Rh-) Factor is much more rare than the Rh-positive (Rh+) Factor, accounted for only 15% of the US Population. The Rh-negative blood types are A-, B-, AB- and O. The Rh-positive types are A, B, AB and O.
There are 8 main blood types in human beings. So what does this mean and why does it matter? Now that you know you are pregnant, your doctor should be checking your blood for the Rh-negative (Rh-) Factor.
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