Doppler velocimetry of the fetal middle cerebral artery in patients with preterm labor and intact membranes.

Adult; Blood Flow Velocity; Cerebral Arteries; Cohort Studies; Delivery; Obstetric; Extraembryonic Membranes; Female; Fetus; Gestational Age; Humans; Labor Stage; First; Logistic Models; Obstetric Labor; Premature; Pregnancy; Prospective Studies; Pulsatile Flow; Risk; Sensitivity and Specificity; Time Factors; Ultrasonography; Doppler; Prenatal; Umbilical Arteries; Vascular Resistance