| Study | Reason for exclusion |
|---|---|
| Armand 1996 | Not randomised |
| Carey 1987 | Not randomised |
| Greer 1988 | Not randomised |
| Lucas 1990 | Not randomised |
| Marseglia 2014 | Not randomised |
| Narayanan 1982 | Human‐milk‐fed infants received a mixture of maternal and donor breast milk |
| O'Connor 2003 | Not randomised |
| Svenningsen 1982 | Control group received maternal and donor breast milk |
| Tewari 2018 | Randomised trial of early versus late feeding of very preterm infants with breast milk |