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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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NVWolf NVWolf
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11 years ago
My birth certificate only has a negative sign in the space marked blood type. I was born in 1994 and my mothers blood type was RH-. What is my blood type if it only has - and is it rare? Thanks.
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11 years ago
That is your RH type.  Since you're mom is Rh negative they always test the baby.  If you were Rh positive, and you and your mom's blood mixed while she was pregnant, she could form antibodies to the Rh factor. (also called the D antigen)  This wouldn't usually effect the first baby, but if she had more kids that were Rh +,  now that she has antibodies built up, they would attack the baby's blood and it could be born with severe anemia or even die.

Mom's with Rh negative blood are given a shot of synthetic anti-D (called rhogam) that prevents them from learning how to make antibodies against it.
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bug2012bug2012
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11 years ago
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