Preterm Infants By Arcangela Lattari Balest, MD, University of Pittsburgh, School of Medicine Reviewed / Revised Oct 2022 View Patient Education Etiology Complications Diagnosis Preterm, Very Preterm, and Extremely Preterm Infants Complications Symptoms and Signs Evaluation Prognosis Treatment Prevention Key Points More Information Late Preterm Infants Complications Evaluation Prognosis Treatment Key Points Topic Resources ELBW Infant Prognosis Prediction Disability rates of singleton... Screening for Retinopathy... An infant born before 37 weeks gestation is considered preterm.