Change of blood group

Sharon - posted on 12/12/2008 ( 14 moms have responded )

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Hi, after I had a em c section with my daughter at 31 wks my blood group changed from 0 Positive to 0 Rhesus Negative & i now have to carry a card which tells medical staff that I am anti kell ? Medical staff said that something passsed through the placenta & that i am lucky cus it could have passed through to my daughter & killed her.

Has this happenend to anyone else? i had never heard of this before & haven't heard anything about it since ????

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Sabina - posted on 12/12/2008

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Hi Sharon. My blood type is O- and since my husband is A+ when I got pregnant I had to get a shot to prevent the similar thing from happening. Basically, O- is recessive type and your baby is automatically same type as her/his father. Since you blood is missing Rhesus should there be any bleeding during pregnancy it is possible for your body to mistake the fetus/baby as a foreign body and your immune system could kill it (this is very layman way of putting it but that is the gist of it). That is why the shot is necessary to make sure that does not happen. I also received a second shot right after having my baby. Should we have more children, we will have to repeat the process. From information you have, it sounds like something similar occurred but I agree that you should ask your new doctors for a better explanation.

Jessica - posted on 04/04/2010

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Sharon,

I thought you might be interested in visiting a site that will tell you more about the RH- Factor. It is www.RhNegativeRegistry.com. Rh- blood is very rare and beyond pregnancy, yoo could encounter issues down the road, if faced with an illness, injury or catastrophy!

Good Luck!
Jessica

Carrie - posted on 12/12/2008

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I found this on a obgyn website;

No, it isn't possible to change blood types. But Rh Positive women are identified by their Rh Positive red blood cells. There is a very weak variant called the "Du" variant. It is actually an Rh Positive antigen, which would make a woman "Rh Positive," but since it is very weakly expressed in tests, it's possible to be mistakenly read as Rh Negative. Today, any Rh Negative woman should be tested further for the Du variant. If it's positive, then the blood type is corrected to Rh Positive, and no Rh Immune-globulin need be given.



I dont think it is possible to go from + to - ............immunology wont work that way from what I know. Hmmmmm..................how unusual.

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Zoe - posted on 10/06/2012

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Yes I had rh negative blood and there was a great concern for my unborn child. I was often sent to the lab where they tested my blood over and over. My mother also had rh negative blood. The concern that the doctor had was that my baby may be born with this type blood and she would have had to undergo a complete blood transfusion. If not I would have to have a shot which would cost me 100 dollars. I did'nt mind the shot for me but I didn't want the blood transfusion for my unborn child. As it would be I didn't need the shot and my baby didn't need the transfusion. After my baby was born and I had to take her for her two week examination I questioned the doctor about the blood and the procedures that I was informed about, the doctor told me that my baby was born with O positive blood and my blood had changed to A positive! I was so surprised I just felt it was a miracle from God! My doctor knew as well as I that I indeed had Rh negative blood, that has been 36 years ago,my daughter is fine and so am I Thank God!

Iridescent - posted on 04/04/2010

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It is most likely they misread it. You may have a variant of the positive antibody which is easily read as a negative in error (called "du-"). http://www.gynob.com/rh.htm
The test to determine for sure what you are is "weak D testing".

Melissa - posted on 12/13/2008

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my mother was born "blue" due to an Rh factor that wasn't caught. her older sister wasn't affected as alot of firstborns are able to escape that problem. its more common among second and third children and so on. what had effectivly happened is that my mothers blood entered my grandmothers bloodstream and her blood being positive was marked by my grandmothers body as an invader since my grandmother blood didn't have the extra "tag" (being the rhesus) on it. so most logically my grandmothers body created an antibody to destroy this invader. now since antibodies can cross the placental barrier, it did indeed enter my mothers blood stream and began to destroy her red blood cells. when she was born she needed a blood transplant as well as some iv medical treatment for a number of blood complications. really what had happened was that the antibodies disabled a very important part of my mothers immune system.

Sharon - posted on 12/12/2008

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Thanx for all of your advice, I now live in Tenerife & have completely different doctors so i will ask them to give me a re test. I will let you know the outcome.

Thanx again, Shaz xxxxx

Amie - posted on 12/12/2008

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Could it be that you were never tested beforehand? or they screwed up your test and gave you a false positive?
Here it's pretty standard practice to get the testing done at about the 2-3 month mark. Then the doctors are equipped with everything they need to know for the rest of the pregnancy.
One of my friends is RH negative and needed to get the shot in the hip closer to the end of her pregnancy's to be on the safe side. The vast majority is RH positive and an RH negatives body will attack and try to kill off the fetus which it views as a virus. My friends partner was never tested she was just given the shot to be on the safe side, it's easy, less stress, no waiting for tests and no harm to baby. She was uncomfortable for awhile due to the shot but who isn't after getting stabbed with a needle there?
Jacinthe is right too, your blood type has not changed, you are still O+ but have a -RH factor.

Jacinthe - posted on 12/12/2008

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First it's not a change of blood group, since you're still O, but a change of Rhesus factor. And I can understand how someone might go from negative to positive, but I really, really don't see how someone could go from positive to negative... Maybe there was a mix up in tests, so maybe you should ask your doctor for more blood tests so you can be sure of what you are? If you really are Negative now, and the father of the baby is Positive, then you'll have to get a vaccine on your next pregnancy to avoid it hurting your baby. But with the vaccine there really isn't any danger, it's a regular procedure.

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Huh. Seems odd to me, too. I don't know how you could got from being rh + to rh-. Maybe I'm not understanding what you're saying correctly?

Jessie - posted on 12/12/2008

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ps. I may have the terminology incorrect (mixed up antibody and antigen, but the idea is still the same)

Jessie - posted on 12/12/2008

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I have heard of going from Oneg to Opos, but never the opposite, the Rhesus is an antibody, the blood has all kinds of antibodies to fight of different kinds of bacteria's and antigens, what happens when someone is RHneg it means that their blood does not carry the RH antibody meaning it has never been introduced to the RH antigen one a person's blood has been introduced to the antigen it will create the antibody itself to fight off the antigen(kind of like when you get a vaccine they give you a little bit of the diseases antigen in order for your body to create the antibody so your body can fight off the antigen) I don't know if you understand this whole thing, but it's basic anatomy and physiology, being positive for that RHfactor(antibody) means that your body has already been introduced to the antigen(probably from your mother or father) but I have never ever heard of being able to become negative(meaning your body all of a sudden stopped producing the antibody and destroyed all that was there) are you sure you didn't go from neg. to pos?

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