A＋A→A、

O;A＋B→A、

B、O、AB;

A＋O →A、O;

A＋AB→A、B、

AB;B＋B→B、

O;B＋O→B、

O; B＋AB→B、A、AB;

O＋O→O;

O＋AB →A、B;

AB＋AB→A、B、AB;

If husband and wife's blood type is "A" and "B";The baby's blood type in addition to the "A" or "B" type;There will be "O" or "AB" type.