FIELD: medicine, immunological laboratory diagnostics. ^ SUBSTANCE: at terms from 6 to 12 wk of gestation one should study relative content of CD3+CD16+ lymphocytes in peripheral venous blood and at its values being either equal or above 5.4% one should predict the development of light-degree gestosis to carry out the complex of curative-prophylactic means. ^ EFFECT: higher efficiency of prediction. ^ 3 ex, 1 tbl