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Q: Baby Unknown

asked by: rollins9773 on February 24th, 2006

New User

My brothers ex girl friend is pregnant it could either be his or her current boy friends. Her boyfriend's blood type is ab and my brother's blood type is o . When the baby is born they are going to use the baby's cord to check the blood type. My question is...

If the baby is o does that mean the baby is tryely my brothers or can an ab person have an o baby?

'm sorry I forgot to say that the mother of the baby is o
but her lpn told her that the baby always takes after the fathers blood type.

Last edited by rollins9773 on February 24th, 2006 03:49 PM; edited 1 time in total

Replies(3)

acoles70

replied on February 24th, 2006

Experienced User

Re: Baby Unknown

rollins9773 wrote:

my brothers ex girl friend is pregnant it could either be his or her current boy friends. Her boyfriend's blood type is ab and my brother's blood type is o . When the baby is born they are going to use the baby's cord to check the blood type. My question is...

If the baby is o does that mean the baby is tryely my brothers or can an ab person have an o baby?

if the baby is o the mother is either o or the father is o or both of them are. My husband is o and I am o , so our baby is o . You need to know the mother's blood type. Ab is a rare blood type. So if she has a popular blood type (like o ) then the baby will have an 80% chance of being o . My dad is ab- and my mom is o . They had three children, all o . You have to know what the mother's blood type is. Normally the baby will have the mother's blood type anyway.
Ashlee

acoles70

replied on February 24th, 2006

Experienced User

Re: Baby Unknown

rollins9773 wrote:

i forgot to tell you. A person with any type of blood, whether it be o, ab, a, or b will always be that type. An o person will always be o , an ab will always be ab. So there is no way an ab can have an o baby unless the mother is o . One of the parents has to be o for the baby to be o .
Ashlee

Clambake

replied on March 3rd, 2006

New User

I would say a paternity test is going to tell you better who the father is than trying to guess from blood type.

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