PIP: 100 cases of abortion, 45 cases of incomplete abortion, 15 cases of complete abortion, and 40 cases of pregnancy termination under 12 weeks, were studied in a comparison of placental transmission of fetal erythrocytes in maternal circulation under these conditions. Positive control smears (fresh cord blood of newborn babies) and negative control smears (adult males). The results of this study show that the incidence of transplacental hemorrhage is higher in abortion cases, whether spontaneous or induced, as compared with normal pregnancy and labor. 20% of cases where duration of pregnancy was more than 8 weeks needed 2nd curettage within 15 days of termination. Of these transplacental hemorrhage was found to be 100%. This is highly significant for Rh negative females.