Prevention of Rhesus Immunization. A Controlled Clinical Trial with a Comparatively Low Dose of Anti-D Immunoglobulin

Abstract
A controlled clinical trial was carried out to test the effectiveness of a comparatively low dose of anti-D immunoglobulin (250 μg) in preventing rhesus immunization. In the control group 17 out of 329 women (5%) formed rhesus antibodies, whereas in the treated group only 3 out of 333 women (0.9%) showed active immunization, all three of whom had an exceptionally large transplacental bleeding.