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It's possible if both parents are heterozygous for both Rh factor and ... type-A-ness, whatever the word for that is. That is if they're both +- and AO genetically, they'd both have blood type A positive, but they'd both have the potential to pass along blood type O and Rh factor negative. If the baby gets O- from both mom and dad, then the baby would be OO -- and therefore O negative.

It's not necessarily what you would expect (7 times out of 8, the baby would be type A, Rh postive, or both), but it is possible.

If they have a B negative baby, mom's been fooling around on dad.

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Which baby gets erythroblastosis fetalis?

The second baby, normally. Erythroblastosis Foetalis is when a baby with a positive blood group is born to a mother of a negative blood group, and the mother has been 'sensitized' during a previous pregnancy. The mother's body identifies the fetus as a 'foreign' protein and her body's immune system tries to fight the foreign protein, much like an allergic reaction.


If a mother has blood type O-negative and the father has blood type A-positive what are the possible blood type outcomes of their children including the positive and negative aspects?

I'm an O- mother of three (3) with an A+ father.The bloodtype/s of your offspring can vary.....Our firstborn, (son) was born with my blood type= O-our second born, (daughter) has her father's blood type= A+and our youngest, (son) has a mixture of the two= A-While I couldn't tell you whether an O+ outcome is possible, {my guess is it would be?!} I will say I was happy with the outcome in our family...it's kinda cute really.......that my eldest boy shares my B/T; our daughter shares her father's & our 'baby' had to be different & was born with a concuction of both.I hope this satisfies any curiosity & answers your's, & other's Q.


Can a mom with Rh positive blood have an Rh positive baby?

The most severe form of erythroblastosis fetalis is that resulting from Rh incompatibility. But you can have erythroblastosis fetalis with ABO incompatibility as well. And this can occur with any child, even the first, and even with an Rh-negative child. However, if you're referring to Rh-incompatibility erythroblastosis fetalis, the answer to your question is, "Not usually" (assuming she hasn't had a previous Rh-positive child). In Rh-incompatibility, erythroblastosis fetalis occurs with the woman's second Rh-positive child. The first Rh-positive child's blood gets into the mother's bloodstream (e.g. at childbirth). The mother's blood makes antibodies to Rh. Since the first child is already born, this does not affect the first child. Then, when she has a second Rh-positive child, her antibodies cross the placenta and attack that child's blood cells. On the other hand, if the mother is exposed to the Rh factor of the first child's blood earlier in the pregnancy somehow, then I suppose she could develop enough antibodies to cause a problem for that first child.


What would be expected if a woman with blood type AB has children with a man who has blood type AB?

That would depend on whether the bloods types are both negative or both positive or one of each, If the blood types are both the same then there will be no problem, if the mother has negative blood and the father positive, the baby can be born "blue", which basically means the mothers blood being negative is trying to destroy the fathers positive antibodies from his blood in the baby, this is not too much of a problem as midwives will administer an "anti D" injection to the mother to protect the baby, if untreated the baby will be born with blue lips, toes, fingers and other extremities, a blood transfusion usually sorts any problems and does not have any long term problems for mother or baby.


Can type a POSITIVE mother and o positive father have a b NEGATIVE child?

Yes, it is possible for a B negative child to be born to parents who are type A positive and O positive. This is due to the inheritance of blood type alleles from both parents that can result in the child having a different blood type than either parent.

Related Questions

Can a baby be born with positive blood if both parents have negative blood?

No, it is not possible.


Can your body reject a baby with a different blood type?

If you have a negative blood type and your first born has a positive blood type, then if your second has a positive blood type as well, your body can try and reject it at birth. They give you a shot for it. (At least they used to) I had a positive blood type baby, I'm o negative, my second I needed a shot for, of course, this was 25 years ago so....


Which baby gets erythroblastosis fetalis?

The second baby, normally. Erythroblastosis Foetalis is when a baby with a positive blood group is born to a mother of a negative blood group, and the mother has been 'sensitized' during a previous pregnancy. The mother's body identifies the fetus as a 'foreign' protein and her body's immune system tries to fight the foreign protein, much like an allergic reaction.


If a mother has blood type O-negative and the father has blood type A-positive what are the possible blood type outcomes of their children including the positive and negative aspects?

I'm an O- mother of three (3) with an A+ father.The bloodtype/s of your offspring can vary.....Our firstborn, (son) was born with my blood type= O-our second born, (daughter) has her father's blood type= A+and our youngest, (son) has a mixture of the two= A-While I couldn't tell you whether an O+ outcome is possible, {my guess is it would be?!} I will say I was happy with the outcome in our family...it's kinda cute really.......that my eldest boy shares my B/T; our daughter shares her father's & our 'baby' had to be different & was born with a concuction of both.I hope this satisfies any curiosity & answers your's, & other's Q.


Can a mom with Rh positive blood have an Rh positive baby?

The most severe form of erythroblastosis fetalis is that resulting from Rh incompatibility. But you can have erythroblastosis fetalis with ABO incompatibility as well. And this can occur with any child, even the first, and even with an Rh-negative child. However, if you're referring to Rh-incompatibility erythroblastosis fetalis, the answer to your question is, "Not usually" (assuming she hasn't had a previous Rh-positive child). In Rh-incompatibility, erythroblastosis fetalis occurs with the woman's second Rh-positive child. The first Rh-positive child's blood gets into the mother's bloodstream (e.g. at childbirth). The mother's blood makes antibodies to Rh. Since the first child is already born, this does not affect the first child. Then, when she has a second Rh-positive child, her antibodies cross the placenta and attack that child's blood cells. On the other hand, if the mother is exposed to the Rh factor of the first child's blood earlier in the pregnancy somehow, then I suppose she could develop enough antibodies to cause a problem for that first child.


Can a baby be born with positive blood if both parents are negative?

No. If both parents are Rh negative, they are homozygous recessive for the Rh factor and can only pass on recessive alleles to their children, and a positive Rh factor is a dominant trait.


What would be expected if a woman with blood type AB has children with a man who has blood type AB?

That would depend on whether the bloods types are both negative or both positive or one of each, If the blood types are both the same then there will be no problem, if the mother has negative blood and the father positive, the baby can be born "blue", which basically means the mothers blood being negative is trying to destroy the fathers positive antibodies from his blood in the baby, this is not too much of a problem as midwives will administer an "anti D" injection to the mother to protect the baby, if untreated the baby will be born with blue lips, toes, fingers and other extremities, a blood transfusion usually sorts any problems and does not have any long term problems for mother or baby.


Can a baby be born with blood group O if mother is blood group ARh negative?

The answer is no. If both parents have a positive Rh factor, the child will have a positive Rh factor. For example, my mother's blood type was O positive and my father's blood type was A negative. My blood type is 0 negative. I got my mother's blood type but my father's Rh factor. The negative Rh factor has to be passed from parent to child. If both parents had negative Rh factors the child in question would also have a negative Rh factor. The different types of blood, a,b,o,ab, and abo have no influence on the child having the negative Rh factor. Expecting mother's having the negative Rh factor need injections of Rhogam if the father of the child has a positive blood type. This is needed because the mother's body will attack the fetus if the baby has a positive blood type. The body doesn' recognize it and treats it as an invader. The baby can be born severly anemic or can even die. This will also effect pregnancies after that so I urge you to speak with your doctor regarding this issue. I hope I answered your question. Best wishes.............Theresa


Can a child be born with a negative blood type when both parents have positive blood types?

i think so because in math class two negatives equal a positive.


Can 0 positive parents born an A positive child?

No, two parents who are both blood type O positive cannot have a child who is blood type A positive. Blood type inheritance follows specific rules, and in this case, it is not possible for two O positive parents to have a child with blood type A positive.


You are o what blood type do you have to worrie about when having a baby?

None. What you have to worry about is if the mother's blood type is (-) negative and the father's is (+)positive. When this happens, the baby inside the mother will be (+) and the mother will make antibodies to the baby's blood for the first pregnancy. This will not affect the firstborn, but will affect the second born. This is why they give Rh - moms a shot of Rhogam to keep the mothers antibodies from attacking the baby's bloodcells resulting in anemia.


Will the baby be healthy if father is 0 positive and mother b positive?

If a dad is O+ and the mom is B+, there is no reason for the baby to be born unhealthy, at least due to blood typing.