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A member asked:
When develops baby's blood type? at what stage of pregnancy? i have negative blood my husband positive
A doctor has provided 1 answer
Conception: Blood type is determined genetically, so the baby's blood type was determined at conception. Since you are rH negative, if you have vaginal bleeding or a miscarriage you will need to be treated with a product called rhogam to prevent future immune responses to any future pregnancies.
Answered 10/31/2014
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