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[Immunization with partner lymphocytes: improvement of pregnancy rate in sterility patients].

In a two-centre prospective study 20 patients with a history of unsuccessful sterility treatment underwent immunization with paternal lymphocytes to improve the pregnancy rate in the subsequent therapeutic AIH or IVF/ET cycle. Unsuccessful sterility treatment was defined as no pregnancy after 8 properly monitored AIH cycles and at least one diagnostic IVF/ET or more than 3 IVF with transfer of 3 embryos. After successful immunization expressed by the induction of Fc-receptor blocking antibodies 10/20 patients became pregnant. Nine of these patients delivered healthy children, one patient experienced a first trimester abortion. A successful second pregnancy occurred in 6 of these patients. No significant correlation between the previous history and pregnancy success could be found, except a slight advantage for patients with a history other than tubal sterility. There were no differences in the anamnestic data as well as in the success rate between the two independent centres Göttingen and Leuven (10 patients each). These data suggest, that adjuvant immunotherapy might improve markedly the pregnancy rates in selected cases of sterility.