A child inherits their blood type from both parents — the Blood Type Calculator uses basic genetics to predict which blood types a baby could have based on each parent's type. Select the Mother's Blood Type and Father's Blood Type to see the Most Likely Blood Type for a child, along with the Total Possible Blood Types and the Chance of Rh Positive.
Most Likely Blood Type
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Total Possible Blood Types
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Chance of Rh Positive
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A baby's blood type is determined by the combination of genes inherited from both parents. Each parent contributes one ABO gene and one Rh gene, creating the child's unique blood type through genetic inheritance patterns.
Yes, a child can have a different blood type than either parent. For example, if one parent is type A and the other is type B, their child could have type O, AB, A, or B blood, depending on the specific genotypes of the parents.
The rarest blood types include AB-negative (found in less than 1% of the population), followed by B-negative and A-negative. AB-positive is relatively rare at about 3-4% of the population, while O-negative is the universal donor type.
Knowing your baby's potential blood type helps prepare for medical situations, blood transfusions if needed, and understanding Rh incompatibility risks during pregnancy. It's also valuable information for future medical care and family health records.
Yes, if both parents with type B blood carry the recessive O gene (genotype BO), there's a 25% chance their child could have type O blood. This happens when the child inherits the O gene from both parents.
O-negative blood is known as the universal donor because it can be given to people with any blood type in emergency situations. However, O-negative individuals can only receive O-negative blood themselves.
Blood type calculators show all genetically possible outcomes based on Mendelian inheritance, but they cannot predict the exact blood type with 100% certainty. The actual blood type can only be determined through laboratory testing after birth.