<qa>  What is the primary outcome of the NEC?This prospective, randomized double blind controlled trial is undergoing in 102 preterm 28-33 weeks gestation VLBW birth weight 1000-1499g neonates fulfilling the inclusion criteria. The study group was fed with probiotics once daily with breast milk from first feeding and the control group only breast milk without the addition of probiotics. The primary outcome was the development of NEC stage II and III. NEC is categorized by modified Bells classification. 