Voctus t1_j1qpyn0 wrote
Reply to comment by ModlrMike in What happens if a mother‘a child has a non-compatible blood type? What will happen when she is pregnant? by thebookklepto
Where I live they find out the fetus’s blood type and check for mismatch. There is enough fetal dna floating around in the mother’s blood to check things like blood type, gender, and chromosomal abnormalities (like Down’s syndrome).
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