Association of Exclusive Breast Milk Intake and Outcomes in Infants With Uncomplicated Gastroschisis: A National Cohort Study

Study Design and Population

McMaster University performed a retrospective review of infants born between 2014 and 2022 with uncomplicated gastroschisis 0:13. The study compared outcomes between infants receiving exclusive breast milk versus those receiving supplemental or exclusive formula 0:13.

Primary Findings

Infants with exclusive breast milk intake and those with supplemental or exclusive formula intake had similar outcomes 0:24. No significant differences emerged between feeding groups across multiple endpoints: time to reach full enteral feeds 0:24, duration of parenteral nutrition 0:24, rates of necrotizing enterocolitis 0:24, and length of hospital stay 0:24.

Clinical Interpretation

Formula intake versus exclusive breast milk intake does not affect outcomes in uncomplicated gastroschisis 0:44. This challenges the assumption that exclusive breast milk confers measurable advantage in this specific population, at least for the outcomes measured 0:24.

What This Changes

For centers that have been counseling families toward exclusive breast milk feeding based on presumed outcome benefits in gastroschisis, this evidence suggests that formula supplementation or exclusive formula use is a reasonable alternative when breast milk is unavailable or insufficient 0:44. The decision can be driven by maternal preference and lactation feasibility rather than concern about compromising surgical outcomes 0:44.

The study is limited by its retrospective design 0:13. The definition of "uncomplicated" gastroschisis may exclude the subset of patients most vulnerable to feeding intolerance 0:13. The outcomes measured—time to full feeds, TPN duration, NEC, length of stay—are standard 0:24 0:24 0:24 0:24. Longer-term growth or neurodevelopmental endpoints were not assessed and might reveal differences not captured in these short-term surgical outcomes.

What the study examined

A retrospective cohort from McMaster University reviewed infants born between 2014 and 2022 with uncomplicated gastroschisis — meaning no intestinal atresia, perforation, or necrosis at birth 0:13. The question was whether exclusive breast milk feeding conferred the outcomes advantage in this population that it does in premature infants and other high-risk neonates 0:13.

What they found

Infants receiving exclusive breast milk and those receiving supplemental or exclusive formula had similar outcomes across every metric examined 0:24. The groups showed no significant differences in time to reach full enteral feeds 0:24, duration of parenteral nutrition 0:24, rates of necrotizing enterocolitis 0:24, or length of hospital stay 0:24.

What this means for practice

For uncomplicated gastroschisis, formula intake versus exclusive breast milk intake does not appear to affect outcomes 0:44. This is clinically useful information when counseling families, particularly when maternal milk supply is limited or when logistical barriers make exclusive pumping difficult during a prolonged NICU stay 0:44.

The finding does not diminish the general benefits of breast milk — it suggests that in this specific population, with this specific congenital anomaly, the margin of benefit may be smaller than in other contexts 0:24. The study was retrospective and limited to uncomplicated cases 0:13, so it does not address complex gastroschisis with associated intestinal complications, where the anti-inflammatory and gut-protective properties of breast milk might still matter more.

What remains uncertain

The study does not report whether there were baseline differences between the feeding groups — maternal demographics, gestational age distribution, or reasons families chose or were unable to provide exclusive breast milk. It also does not address longer-term outcomes like growth velocity after discharge or rates of feeding intolerance at home. The definition of "uncomplicated" is critical here and not fully detailed in this summary.