Abstract
The occurrence of Rh immunization was investigated in 386 secundigravidae whose first pregnancy was terminated by induced abortion and who were not given anti-D immunoglobulin after the induced abortion. Of these, 6 (1.57%) already proved to be seropositive at the beginning of their second pregnancy, another 6 (1.57%) became positive by the end of the second pregnancy, i.e. 3.14% altogether as demonstrated with papain-treated RBC. If instead the indirect antiglobulin (Coombs) test was used, 3 women (0.77%) proved to be positive at the beginning and 9 (2.31%) at the end of the second pregnancy. Supposing that 0.5% of the secundigravidae became immunized during the second pregnancy, the rate of immunization after induced abortion in non-protected cases may be calculated to be 2.64% using the papain technique and 1.81% when the antiglobulin test is applied.
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