PRESENT DAY knowledge of the Rh factor has created many problems. An example is the advisability of interrupting a pregnancy. This question arises in those Rh-negative women who have had previous erythroblastotic babies and whose husbands have been shown to be homozygous for the factor Rh. Within the past year we have seen 2 cases, both of which illustrate the fact that serologic results in such cases must be cautiously interpreted and carefully checked.
REPORT OF CASES
Case 1.—Mrs. M. G., a 31 year old white woman, para II, gravida III, was referred to the Laboratory of the Medical College of Virginia at approximately four and a half months' gestation. Her previous history revealed that she was delivered of a normal female child in 1938 and of a full term erythroblastotic infant in 1945. The latter lived three days. At this time, March 1947, she was found to be Rh