T and B lymphocytes during pregnancy.

Peripheral blood lymphocytes from 105 pregnant and 99 control women have been tested weekly for the nine months gestation period. Our results show no significant variations between age-matched controls and pregnant group lymphocytes in terms of their capacities to make spontaneous E-rosettes, active rosettes, EA-rosettes, to stain with anti-immunoglobulin antiserum, in cytotoxic anti-T serum assay and to dissociate into high (T) and low (B) electrophoretic mobility fractions. Concomitantly, the effect of pregnant serum on rosettes formation has been tested and found not to be different from the effect of pooled control sera.