Occurrence of Unusual Positive Coombs Reactions and M Factors in the Blood of a Mother and Her First Baby

Abstract

FOLLOWING routine investigations of blood factors of a woman, aged twenty-four, and her first baby, it was found that the red cells of the mother and her child both gave positive reactions to the Coombs test, when first tested shortly after the birth of the child, and on several occasions during the next eighteen months. The red cells of the father, and those of a second child born fifteen months after the first, gave negative reactions to the Coombs test.