Formula versus donor breast milk for feeding preterm or low birth weight infants
- PMID: 31322731
- PMCID: PMC6640412
- DOI: 10.1002/14651858.CD002971.pub5
Formula versus donor breast milk for feeding preterm or low birth weight infants
Update in
-
Donor human milk for preventing necrotising enterocolitis in very preterm or very low-birthweight infants.Cochrane Database Syst Rev. 2024 Sep 6;9(9):CD002971. doi: 10.1002/14651858.CD002971.pub6. Cochrane Database Syst Rev. 2024. PMID: 39239939 Free PMC article.
Abstract
Background: When sufficient maternal breast milk is not available, alternative forms of enteral nutrition for preterm or low birth weight (LBW) infants are donor breast milk or artificial formula. Donor breast milk may retain some of the non-nutritive benefits of maternal breast milk for preterm or LBW infants. However, feeding with artificial formula may ensure more consistent delivery of greater amounts of nutrients. Uncertainty exists about the balance of risks and benefits of feeding formula versus donor breast milk for preterm or LBW infants.
Objectives: To determine the effect of feeding with formula compared with donor breast milk on growth and development in preterm or low birth weight (LBW) infants.
Search methods: We used the Cochrane Neonatal search strategy, including electronic searches of the Cochrane Central Register of Controlled Trials (CENTRAL; 2019, Issue 5), Ovid MEDLINE, Embase, and the Cumulative Index to Nursing and Allied Health Literature (3 May 2019), as well as conference proceedings, previous reviews, and clinical trials.
Selection criteria: Randomised or quasi-randomised controlled trials (RCTs) comparing feeding with formula versus donor breast milk in preterm or LBW infants.
Data collection and analysis: Two review authors assessed trial eligibility and risk of bias and extracted data independently. We analysed treatment effects as described in the individual trials and reported risk ratios (RRs) and risk differences (RDs) for dichotomous data, and mean differences (MDs) for continuous data, with respective 95% confidence intervals (CIs). We used a fixed-effect model in meta-analyses and explored potential causes of heterogeneity in subgroup analyses. We assessed the certainty of evidence for the main comparison at the outcome level using GRADE methods.
Main results: Twelve trials with a total of 1879 infants fulfilled the inclusion criteria. Four trials compared standard term formula versus donor breast milk and eight compared nutrient-enriched preterm formula versus donor breast milk. Only the five most recent trials used nutrient-fortified donor breast milk. The trials contain various weaknesses in methodological quality, specifically concerns about allocation concealment in four trials and lack of blinding in most of the trials. Most of the included trials were funded by companies that made the study formula.Formula-fed infants had higher in-hospital rates of weight gain (mean difference (MD) 2.51, 95% confidence interval (CI) 1.93 to 3.08 g/kg/day), linear growth (MD 1.21, 95% CI 0.77 to 1.65 mm/week) and head growth (MD 0.85, 95% CI 0.47 to 1.23 mm/week). These meta-analyses contained high levels of heterogeneity. We did not find evidence of an effect on long-term growth or neurodevelopment. Formula feeding increased the risk of necrotising enterocolitis (typical risk ratio (RR) 1.87, 95% CI 1.23 to 2.85; risk difference (RD) 0.03, 95% CI 0.01 to 0.05; number needed to treat for an additional harmful outcome (NNTH) 33, 95% CI 20 to 100; 9 studies, 1675 infants).The GRADE certainty of evidence was moderate for rates of weight gain, linear growth, and head growth (downgraded for high levels of heterogeneity) and was moderate for neurodevelopmental disability, all-cause mortality, and necrotising enterocolitis (downgraded for imprecision).
Authors' conclusions: In preterm and LBW infants, moderate-certainty evidence indicates that feeding with formula compared with donor breast milk, either as a supplement to maternal expressed breast milk or as a sole diet, results in higher rates of weight gain, linear growth, and head growth and a higher risk of developing necrotising enterocolitis. The trial data do not show an effect on all-cause mortality, or on long-term growth or neurodevelopment.
Conflict of interest statement
MQ: nothing to declare.
NDE declares the following: receiving a research grant award for an RCT of breast milk products by Prolacta Bioscience, 2017; receiving a grant from Danone Early Life Nutrition to support a study on feeding in late and moderately preterm infants, 2018; receiving a grant from Nestle Nutrition for transcriptomic analyses of gut tissue, 2016; lectures with Wyeth Nutrition in 2017, Nestle Nutrition Institute in 2017 and 2018, Philipps in 2017, and Fresenius, 2017.
WM: nothing to declare.
Core editorial and administrative support for this review has been provided by a grant from The Gerber Foundation. The Gerber Foundation is a separately endowed, private foundation, distinct from the Gerber Products Company. The grantor has no input on the content of the review or the editorial process.
In order to maintain the utmost editorial independence for this Cochrane Review, an editor outside of the Cochrane Neonatal core editorial team who is not receiving any financial remuneration from the grant, Mohan Pammi, was the Sign‐off Editor for this review. Additionally, a Senior Editor from the Cochrane Children and Families Network, Robert Boyle, assessed and signed off on this Cochrane Review.
Figures







Update of
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Formula versus donor breast milk for feeding preterm or low birth weight infants.Cochrane Database Syst Rev. 2018 Jun 20;6(6):CD002971. doi: 10.1002/14651858.CD002971.pub4. Cochrane Database Syst Rev. 2018. Update in: Cochrane Database Syst Rev. 2019 Jul 19;7:CD002971. doi: 10.1002/14651858.CD002971.pub5. PMID: 29926476 Free PMC article. Updated.
Comment in
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Formula feeding results in better growth and weight gain compared to donor breast milk in preterm and low birthweight infants, with a greater risk in necrotising enterocolitis.Arch Dis Child Educ Pract Ed. 2020 Dec;105(6):381-382. doi: 10.1136/archdischild-2019-318459. Epub 2019 Dec 10. Arch Dis Child Educ Pract Ed. 2020. PMID: 31822485 No abstract available.
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