Blood type question about baby!?

Your baby gets one blood-type gene from each parent. B is dominant, O is recessive. (A and B are equal).

The dad is either BB or OB depending on HIS parents, but he has at least one B in him. Since B is a small percent of the population, it's likely he's OB.

So, he could give the child either an O or B. (or if he's BB, he gives the child a B). You are O, so you must have OO - one from each parent.

So the baby would be either O (OO) or B (OB).

Similarly, Rh+ is dominant. A parent who is + could be ++ or +- and ditto for a baby. A person who is - must be -- (- from both parents).

If you are ++, you give the child a +; if +-, you give either + or -. Since he is -- he gives the child -. So, the - combined with your + or - so the child could be + or -. (Either +- or --).

The baby could be either + or -, So choices are O+, O-, B+, B-.

Without detailed analysis or a complete family tree, you don't know if someone is BO or BB, +- or ++. (I.e. if one parent is O and one is B, the child is BO; if both are B, it depends on THEIR parents whether the child is BO or BB, since any B could be a BO. A chile of 2 AB's must be a BB if they are B blood type.) And so on. Note when I say "BO" I mean someone has a B gene from one parent, and an O from the other. Their blood type then is always B.

In the good old days, before DNA tests, that was as accurate as you could get. It was easier to rule out a father by blood type (AB father cannot have an O child, two O parents can't have an A or B or AB child) than to prove who was the father. If the dad and baby were not O it sure helped, since for example about 8% of men are B+ and 3% are B-.

If you are O+ and the baby is B- then - the baby must have gotten B from his dad, and got a minus from you and from him. He has a roughly 50-50 chance of getting the minus from a B+ dad, and 100% chance from a B- dad. That narrows potential dada to 11% of the population and more likely to be the B- guy. (or of course, there are about 4% AB types who also could have a B baby.)

OTOH, if the baby is O and you are too, the father could be anyone except an AB guy, eliminates only 4% of the population. (O+ is about 38% and O- about 6%, for example.)

DNA is so much simpler.

As for transfusions - O can donate for an O, A, B, or B - but a positive cannot donate for a negative, especially for female recipients. So, it depends on what your baby is.

Since you are a + and the baby could either be a - or a +, you will recieve a shot of Rhogam at 28 weeks and possibly right after delivery just to make sure that your body doesnt produce antibodies to attack the baby since the possibility that his blood type is different from yours. It sounds much more horrible than it really is, but I had the shot about a month ago and we're perfectly fine.

Blood type O is a universal blood type(sorta, we can only get blood for other Os), O- is usually used, but if your baby were to come out B- or AB or A+ he could be given your blood.

No pregnant mother gives her blood to her unborn baby. The baby has its own blood, and you have your own, the exchange of nutrients takes place in the placenta, the blood never mixes.

Blood type has nothing to do with health risks, its rH factors, if you're concerned you have have your blood and your husbands blood tested. If theres a risk they just give you a shot a couple times through pregnancy to keep your body from attacking the unborn.

Baby will most likely have o+. The baby normally has only one of the parents' blood types and it's normally the mothers'. Not to mention that o+ is a very strong blood type.

EDIT: Answerer above me is probably a more reliable source. lol

You have only O genes from the ABO group to contribute.

You also have the Rhesus + factor but you can have the negative factor, too

This means you can contribute O, + or possibly O, -, only

The father has B genes from the ABO group but he could also possibly have O genes.

The father has only Rh - factor to contribute.

This means he can possibly contribute B,- or O,- only.

This means baby can have BO, -- and be typed as B-.

or baby may have BO, -+ and be typed as B+

or baby may have OO,-- and be typed O-

or baby may have OO,-+ and be typed O+

If baby is B+ it could receive blood from you or father without an ABO/Rh mismatch.

If baby is O-, it could not receive blood from either of you.

If baby is B- it could receive blood from dad.

If baby is O+ it could receive blood from you.

SO any of the four combinations can occur.

Old Doc

Good question. I don't think you will be able to give the baby blood unless it has positive blood. I have A- and the father has O+ so I have had to get a rogham shot already and will need another one since the babies blood can actually hurt me.

O can give to anyone...and if your baby has the fathers blood you will have to get rhogan shots after the birth

O+, O-, B+ and B- - it all really depends on whether your genes are Rh+ and Rh- or just OO++, and whether he's genes are BO-- or BB--. If you are OO++ and he is BB--, then only one is possible O+ phenotype.

Typically you never give blood directly to a relative or anyone else, unless there are extreme circumstances.

I just have to say that the person who said that you would need a shot of rhogam was wrong. You only need rhogam if your Rh is negative. You are positive, so no rhogam necessary!