title: Ultrasound assessment of the postmature pregnancy.
abstract: The use of ultrasound to identify the fetus at risk for postmaturity among postterm pregnancies was evaluated. The ultrasound findings in 85 postterm pregnancies were reviewed. No grade 0 or grade 1 placentas were observed and grade 2 and 3 placentas were found with similar frequency. The incidence of advanced postmaturity was 12.9%. Advanced postmaturity was found with grade 2 and 3 placentas. Oligohydramnios was very common (81.8%) among pregnancies resulting in postmaturity. The neonatal ponderal index was higher with grade 2 placentas than with grade 3 placentas. The presence of immature placentas (grade 0 or 1) is rare after 42 weeks of gestation. Placental grading cannot be used to predict postmaturity.
mesh_terms: D000293:Adolescent; D000328:Adult; D000653:Amniotic Fluid / Q000502:physiology; D001724:Birth Weight; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007233:Infant, Postmature; D010920:Placenta / Q000033:anatomy & histology; D011247:Pregnancy; D011296:Prenatal Diagnosis; D013577:Syndrome; D014463:Ultrasonography