Fig. 3
From: Analysis of risk factors related to extremely and very preterm birth: a retrospective study
Comparison of complications of premature infants at different gestational ages. The control group was 28–28 + 6 weeks of gestation. NRDS, neonatal respiratory distress syndrome. NICH, neonatal intracranial hemorrhage. NHB, neonatal hyperbilirubinemia. PDA, patent ductus arteriosus. PFO, patent foramen ovale. BPD, bronchopulmonary dysplasia. NEC, neonatal necrotizing enterocolitis