
Keywords: شیر مادر را بیان می کند; CFU; Colony-forming Units; EBM; Expressed Breast Milk; GI; gastrointestinal; GA; gestational age; NICU; neonatal intensive care units; NEC; necrotizing enterocolitis; RCT; randomized controlled trials; Neonates; Surgery; Probiotics; Microbiome; Length of