Clinical variables of blood pressure, proteinuria, edema, and maternal weight have been studied extensively, with particular reference to associated adverse fetal and infant outcomes. The levels of these variables, as well as their relative patterns of change with advancing pregnancy, were investigated by several analytic methods. It was determined that diastolic blood pressure and proteinuria, alone and in combination, profect on fetal and infant outcomes to enable us to create an empirical classification of gravidas whose fetuses were probably at risk. The results must be considered preliminary in view of the fact that the work is still in progress.