Placental Pathologic Changes Associated with Fetal Growth Restriction and Consequent Neonatal Outcomes.

OBJECTIVE: To evaluate the pathological changes of the placenta to determine the mechanism underlying placenta-derived fetal growth restriction (FGR) and investigate its influence on neonatal outcomes. Study design: This retrospective case-control study included 120 singleton pregnancies with FGR as well as 120 gestational age-matched controls. We compared the placental pathological findings and neonatal outcomes according to the presence of placental malperfusion. Results: The FGR group demonstrated lower placental weight (350.8 ± 118.8 vs. 436.1 ± 109.7g, P < .0001), smaller chorionic plate area (157.7 ± 48.0 vs. 201.5 ± 53.4 cm2, P < .0001), and higher rate of villous change lesions (84.2% vs. 52.5%, P < .0001) than the control group. FGR neonates with placental malperfusion had a higher rate of adverse neonatal outcomes (87.1% vs. 63.2%, P = .0175). Conclusion: Small placentas and placental malperfusion reflected in villous changes are associated with FGR. FGR neonates with placental malperfusion are more susceptible to adverse neonatal outcomes.