News Screening for Retinopathy of Prematurity May Start at 31 Weeks by Medscape • 2011/02/28 • 0 Comments Among infants born before 27 weeks of gestation, retinopathy of prematurity stage III did not occur before postmenstrual age of 31 weeks, and criteria for treatment were not reached before 32 weeks. Medscape Medical News Full Story →