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Usually not the first pregnancy, but if the baby is rh positive, during birth some of the baby's blood may cross into the mother's bloodstream and then she will be sensitized and will produce anti-rh antibodies, which could harm the second baby if it is rh positive. There is an injection that is given to rh negative mothers during pregnancy to prevent this reaction.

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What would be the blood type of the child if the mother is B plus and the father is A plus?

ab+ a+ b+


Mother o plus father a- any problem for baby?

Nope. Generally there may be problems only if mother is negative and the father is positive. The antibodies to A/B blood types are too large to pass through the placenta and so cannot hurt the baby.


You have type O plus why does your father have O negative?

there is no problem with that, your Rh+ comes from your mother :) ur father genotype is Rh-Rh- your mother should be Rh+Rh+ or Rh+Rh- so you took one Rh- from your father and one Rh+ from your mother the result will be Rh+Rh- and because the +ve propriety is more dominant your blood type will be +ve even if you have the mix of Rh+Rh-


I am 32year male ab plus bloodgroup can i marry 35year female o blood grup if yes can any problem in pregnancy?

There should not be a problem during pregnancy because of a difference in blood type.


Father is A mother is O plus and the baby is O plus is this the father?

Just because the babys blood and the fathers blood is different, it doesnt mean that there is a possibility that he ain't the father. For example, my fathers blood is different from my sisters and including but he still my father. I hope that answered your question. You are A dominant, but you have the O+ recessive gene. To rephrase what the others have said- if the mother is A plus, she would be AA or AO bloodtype. The father is something with an O as well, if the baby has an O. Father could be BO< AO< OO etc. (or he could have negative blood, and still have a positive blood child from this union)