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Blood TypingHaving the same blood type is not necessary for matching, but if it is important to you for personal reasons, the following will help explain the inheritance pattern of blood typing: ABO Possiblities
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| If the couple's types are: |
The children's could be: |
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| Possible | Not Possible | |
| O and O | O | A, B or AB |
| O and A | O or A | B or AB |
| O and B | O or B | A or AB |
| O and AB | A or B | O or AB |
| A and A | O or A | B or AB |
| A and B | O,A,B or AB | None |
| A and AB | A,B, or AB | O |
| B and B | O or B | A or AB |
| B and AB | A,B or AB | O |
| AB and AB | A,B,or AB | O |
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If the couple's blood types are: |
The donor's type may be: |
| A and A | A or O |
| A and B | A, B or O |
| A and O | A or O |
| B and B | B or O |
| B and O | B or O |
| O and O | Must be O |
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The wife is AB and the husband is: |
The donor may be: |
| A | Any type |
| B | Any type |
| O | Must be O |
| AB | Any type |
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If the husband is AB and the wife is: |
The donor should be: |
| A | AB but not O* |
| B | AB but not O* |
| O | Must be O |
| AB | Any type |
Note: A or B could be used, but if the donor and the wife both contribute the gene for O, the child could be O. This would be an impossible outcome for husband and wife. Two Rh+ parents can have an Rh- child, although two Rh- parents cannot have an Rh+ child.
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