Chapter 23: Newborn Feeding

A substantial section explores the endocrine mechanisms underlying lactation, detailing how prolactin stimulates milk production and how oxytocin triggers the milk ejection reflex essential for effective nursing. The progression of milk composition over time is thoroughly explained, beginning with colostrum—an immunologically dense secretion containing high concentrations of immunoglobulins, particularly IgA—which gradually transitions into mature milk with shifting ratios of proteins, fats, and carbohydrates to meet evolving infant demands. The distinction between foremilk and hindmilk composition and function is clarified, as well as how human milk's dynamic nature contrasts with manufactured infant formulas derived from cow's milk or plant-based sources. Nursing assessment and management constitute a major focus, with detailed instruction on recognizing infant hunger signals, applying the LATCH assessment tool to evaluate breastfeeding technique and milk transfer, and mastering various positioning strategies including cradle, football, cross-cradle, and side-lying holds. The chapter provides evidence-based approaches to preventing and resolving common breastfeeding difficulties such as nipple trauma, breast engorgement, anatomical nipple variations, milk duct obstruction, and mastitis, while also addressing maternal challenges like managing drowsy infants or addressing nipple confusion. Special populations including preterm infants, late preterm infants, and infants requiring phototherapy receive targeted discussion. Practical considerations for working mothers, including milk expression techniques, storage guidelines, and maintaining supply, are integrated throughout. The chapter concludes with comprehensive formula feeding instruction, emphasizing iron fortification, safe preparation protocols to minimize contamination and concentration errors, and feeding techniques that optimize nutrition while fostering maternal-infant connection.