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[Immunologic characteristics of women recurrent spontaneous abortion of unknown etiology. II. Characterization of humoral immunology].

The purpose of this study was to analyze the humoral immune response of non-pregnant women with unexplained recurrent spontaneous abortion (RSA). The study group was consisted of 117 nonpregnant women with RSA and 44 healthy, non-pregnant multigravidas (as a control). The following immunological parameters were analyzed in peripheral blood of two groups of women: the effect of autologous sera on proliferation of lymphocytes stimulated with phytohemagglutinin (PHA) or paternal lymphocytes (in mixed lymphocyte reaction--MLR), incidence of MLR-blocking antibodies (MLR-BAbs) incidence of antinuclear and anticardiolipin antibodies. The results show that women with RSA of unknown etiology differ in some parameters of immune response--higher incidence of antinuclear and anticardiolipin antibodies, absence of serum factors suppressing lymphocyte proliferation in response to PHA and paternal alloantigens--in comparison with nonpregnant normal multigravidas.