Blood Typing For Pregnant Moms

Many of us live our whole lives without knowing or having our blood type tested. However if you are newly pregnant it is important to know your type as it is important for the development of the baby. During prenatal care we only look for the major factors, or antigens, of blood types, and whether you have any antibodies to them. If you are showing that you have some antibodies, more specific tests can be done, and in the on line testing world, lots of minor blood group testing is offered. What is most important is to protect the baby from any antibodies that can cross from mom's blood into the baby's blood. Understanding both how this works, and if there is a set up for any danger is part of the gyno's job. If a woman’s blood type is D-negative, and if her partner is D-positive, the baby has an approximately 60% of also being positive and thus be at risk for Anti-D isoimmunization during this or a subsequent pregnancy.
To explain this condition further we should understand that People have one of four blood types, A, B, AB or O. Each of these is further classified according to the presence or absence of Rh factor proteins on the surface of one’s red blood cells, which carry the Rhesus antigens. One of the main antigens is D. Those positive for the D protein are called "RhD positive"; absent the D protein one is "RhD negative."

To prevent the baby from getting any dangerous blood factors across the placenta, your gyno will test your blood whenever you are pregnant, and then treat accordingly. The prevention strategy has been very effective, it involves administerine the antiboidies a mother might make so that she would not make them. These antibodies however are a human blood product, and somewhat expensive.n the past all the testing is done on mom until the baby is born (and what most pregnant women are still getting today). It is now possible, on a sample of maternal blood, as early as in the first trimester, check the Rh type of your baby without guessing. SensiGene Fetal RHD Genotyping, a new lab test to detect the Rh factor in the fetus by Sequenom, Thus if you are Rh negative, but carrig a negative baby you will not need treatment with the Rhogam. This is actually a very complex topic, and there are many factors we aren't discussing here. If you have a question regarding your blood type, or your baby's type, or any genetic testing you are thinking of, please speak to yopur own gyno, so that you get the best medical care you can!

Interestingly it has been determined that the Rh disease occurs more severely in male fetuses, so that The test interrogates four targets within three exons located on the RHD gene on chromosome one. The test also incorporates male-specific targets on the Y chromosome, because it has been demonstrated that Rh alloimmunization occurs more frequently in male fetuses.

This test thus will detect the presence of a male fetus, so yes, it is possible now on your blood to determine in the first weeks of pregnancy whether you are having a girl or a boy. It is however, not yet a full study of the baby’schromosomes. So some of the mystery still remains, and other supporting tests can help determine the health of the pably.


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