One of the first and most important analysis that the pregnant woman should be is that of blood. This basic analysis determines what kind of blood have and what is your Rh factor. And is that the Rh factor will play an important role in the baby’s health.
The Rh factor is a protein present in the cells and, according to your blood type, each person has this blood type-specific proteins on the surface of red blood cells. There are four blood groups: A, B, AB and O.
In turn, each of the four blood groups are classified according to the presence or not on the surface of the red blood cells of another protein that determines the Rh factor. If the person is a carrier of this protein, it is Rh positive; If it is not a carrier, it is Rh negative.
The greater part of the population, 85 percent, has that particular sequence of amino acids that in common language is usually called Rh +. There are many possible combinations depending on the Rhs of the parents, but Rh sensitization or Rh incompatibility can only occur when the mother is RH-negative and the father Rh positive.
Father Rh positive and Rh negative mother
From all the possible combinations, the risk exists when blood group Rh – woman and man Rh +, although there would be no risk if the baby inherits the Rh-mother.
But when an Rh negative woman and a man Rh positive conceive a child, there is the possibility that the baby has health problems. It is possible that the baby that is forming inside the mother who is Rh negative have RH-positive blood he inherited from the father.
About half of the children with a Rh negative mother and an Rh positive father are Rh positive although it should be noted, before explaining the possible adverse effects that these not be would normally in the first pregnancy, but in the following.
There is no risk of Rh incompatibility in the first pregnancy
The mother is not normally sensitive in the first pregnancy, but in the second or following; These effects are considered first either previous pregnancy even though you have not come to term.
This means that, generally, Rh incompatibility is not a problem when it’s a first pregnancy Since, unless there is some sort of abnormality, the blood of the fetus does not fit into the circulatory system of the mother during pregnancy.
However, during childbirth, the blood of the mother and the baby can intersperse itself. If this happens, the body of the mother recognizes the Rh protein as a substance strange and begins to produce antibodies (protein molecules in the immune system that recognize, and then destroy foreign substances) to attack Rh proteins that enter your blood.
Rh negative pregnant women can also come into contact with the Rh protein (something that could produce antibodies) with Rh positive blood transfusions, miscarriages and extra-uterine pregnancies.
During the following pregnancies, fetal red cells can pass into the bloodstream of the mother as she feeds it across the placenta.
Rh antibodies are not harmless in following pregnancies, because if the mother conceived a baby Rh + woman’s body now Yes will recognize Rh proteins as foreign bodies. Then your antibodies will pass to the baby’s bloodstream to attack those cells.
Consequences of fetal Rh incompatibility
If the body of the mother begins this “ attack ” you can reach the dilation and rupture of red blood cells from the baby. Occurs when this condition, which is known by the name of hemolytic disease or Rh disease of the newborn.
The disease, whose scientific name is “ Erythroblastosis fetalis ”, it is a blood disorder that, given the different blood types, a mother produces antibodies during pregnancy that attack the red blood cells of their own fetus.
Erythroblastosis is named to the emergence in the circulating blood of a high number of erythroblasts, which are precursors of red blood cells, which have been released to circulation.
The severity of this condition can vary widely. In some cases, the baby has no symptoms of disease; in other cases, it can lead to the death of the baby before or shortly after birth. This disorder can be treated in utero (before the birth of the baby) by means of intrauterine transfusion.
When the baby is born, the signs that may occur as signals of Rh incompatibility are: enlarged liver or spleen, generalized swelling, jaundice and anemia. After the birth, depending on the severity of the condition, it is usually necessary to perform a blood transfusion.
Soon we will return on Rh incompatibility and dangers for pregnancy, We focus on how to prevent them and the treatment of the inconsistency in order to avoid the hemolytic disease. We only have to remember that we’re not sure what Rh factor have and believe that we are pregnant it is important to begin with the prenatal consultations as soon as possible.
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