How is it possible that my daughter is blood type O negative if I

ABO blood group system, Definition, Blood Type, & ABO Antigens

Blood Type and Your Heart: Understanding the Vital Connection - CNET

A woman has blood Type A, her baby has blood Type AB: Is it possible that a man who has the blood Type A

How is it possible that my daughter is blood type O negative if I am O positive & her father is A positive? - Quora

If I'm B positive and my sister is O positive are we related? - Quora

I am B positive, and my husband is O positive. How did our child get O positive blood? - Quora

Blood Types - A, B, AB and O Explained

Why are some blood types incompatible with others? - Curious

Can a couple with O negative and O positive blood have a healthy child? - Quora

Human Blood: Rh Blood Types

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Can an O positive mom and an O negative dad have a child with another blood-type? - Quora