It is impossible for a type of O+ baby to have a type of____________mother:

Parent Blood Type Estimate Table:\nABO Blood Type Calculator:\nFather’s Blood Type\nA\nB\nAB\nO\nMother’s Blood\nType\nA\nA, B, AB, or O\nA, B, or AB\nChild’s\nBlood type Must Be\nB\nA, B, AB, or O\nA, B, or AB\nAB\nA, B, or AB\nA, B, or AB\nA, B, or AB\nO\nO\nChild’s Blood Type\nA\nB\nAB\nO\nMother’s Blood\nType\nA\nA, B, AB, or O\nA, B, or O\nFather’s\nBlood type Must Be\nB\nA, B, AB or O\nA, B or O\nAB\nA, B, AB or O\nA, B, AB, or O\nA, B, or AB\nO\nA, B, or O\nABO blood types can be complicated to understand. This is mostly due to the fact that the\n‘O-type’ antigen is masked by the presence of an A- or B-type antigen\n. This is explained in the following chart, showing the different the genotypes that make up the blood types.\nGenotype (DNA)\nBlood Type\nAO or AA\nAB\nAB blood type\nBO or BB\nOO\nO blood type\nFor example, two O blood type parents can produce a child with only O blood type. Two parents with A blood type can produce a child with either A or O blood types. Two parents with B blood type can produce a child with either B or O blood type. One parent with A and another with B can produce a child with A, B, AB or O blood types. If one parent has A and another has AB, they can either produce a child with A, B or AB blood types. If one parent has A and another has O, they can either produce a child with A or O blood types.