[Chorionic gonadotropin concentration dependence on the phenotype of the Rhesus system]. / Zavisimost' kontsentratsii khorionicheskogo gonadotropina ot fenotipa sistemy rezus.

The phenotypes of the rhesus system in pregnant females were studied for impact on maternal blood chorionic gonadotropin (CGT) levels in the second trimester. The polymorphism of the rhesus system was determined in the groups of pregnant females (n = 1591) having different blood CGT levels. There was a significant increase in the frequency of the Rh(d) phenotype (p < 0.01) among the pregnant women with lower chorionic gonadotropin levels. There was also an evident bimodality in the distribution among RH(d) pregnant females.