Fetal growth and placental function assessed by urinary estriol excretion before the onset of pre-eclampsia

Abstract

In a series of 1,316 patients with pre-eclampsia 744 had urinary estriol excretion measured before and 366 after the onset of clinical signs of the disease. Low estriol excretion had a highly significant association with fetal growth retardation and perinatal death both before and after the onset of clinical signs (p < 0.001). As assessed by the incidences of low estriol excretion, fetal growth retardation, and perinatal wastage, pre-eclampsia of early onset (before 37 weeks) was a malignant disease in comparison with pre-eclampsia of late onset (after 37 weeks). Patients destined to develop early-onset pre-eclampsia had a high incidence of subnormal estriol excretion (25.4%; p < 0.001). Although further deterioration of placental function occurred after the onset of clinical signs (41.3%; p < 0.01), fetal growth and prognosis were already determined.