Blood Type Inheritance
Estimate a child's ABO blood type probabilities from parental types or genotypes, plus Rh factor and reverse parent lookup.
Rh type is determined by the D antigen: DD and Dd are Rh+, dd is Rh−
Can receive from
Can donate to
ABO transfusion matrix (full table)
✓ compatible, ✗ incompatible; the highlighted row is your selected type
Rh transfusion matrix
Rh-negative recipients can only take Rh-negative blood; Rh-positive can take both
Under ABO rules O is the universal donor and AB the universal recipient; Rh-negative patients need Rh-negative blood
Lists all parent type combinations that can produce this blood type
How to Use
🩸 Blood Type Inheritance
Pick the ABO blood types of both parents and the tool lists the types a child could inherit, with an estimated chance for each. The classic questions are answered here: can two O parents have an A child, and can A and B parents produce an AB child.
The calculation uses ABO genotypes. Type A may be AA or AO, type B may be BB or BO, type AB is AB, and type O is always OO. Each parent contributes one allele, and the pair determines the child's phenotype. Since A and B are dominant over O, a single A allele (AO) still shows as type A.
✨ Features
- Covers all 16 parental combinations across A, B, AB and O
- Lists possible types ranked with an estimated chance
- Shows clearly which outcomes are impossible
- Runs locally, nothing is stored
🚀 How to Use
- Choose the father's blood type
- Choose the mother's blood type
- The possible types and chances appear immediately
⚠️ Notes
- Chances are assumptions: each parental genotype is treated as equally likely, while real ratios depend on population frequencies, so treat the numbers as illustrative
- Rh and rare subtypes are out of scope: ABO is only one system; Rh negativity and the Bombay phenotype are not covered
- Not a paternity test: blood type can only exclude some combinations and never proves a relationship; legal or medical questions need proper testing
- Trust the lab: for pregnancy, transfusion or surgery, the hospital's blood typing is the authoritative answer
New in v1.1.0
- Genotype mode down to AA/AO/BB/BO/AB/OO
- Rh factor: child Rh+ / Rh− probability
- Probability bars for each blood type
- Reverse lookup of possible parent combinations
New in v1.2.0
- Transfusion compatibility under ABO rules
- Universal donor/recipient notes and the Rh-negative requirement
New in v1.3.0
- Full ABO matrix: all 16 recipient-donor cells, tick/cross marked, selected row highlighted
新增功能（v1.4.0）
- Rh matrix: Rh-positive can take either, Rh-negative only Rh-negative
Visual and functional fixes (v1.4.1)
- Fixed cramped vertical padding on compatibility result rows