



The protocol has been produced in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Protocol extension (PRISMA-P). This will be reported in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. With the PAG, we will carry out a systematic review bringing together all existing research on parent-to-parent support for parents of babies cared for in neonatal units. We are working in collaboration with a study-specific Parent Advisory Group (PAG) of parents who have relevant and varied lived experience of having a baby in neonatal care and those who have been involved in providing peer support. This systematic review will identify quantitative and qualitative evidence to address the role of parent-to-parent support interventions for families of babies cared for in neonatal units, and combine the findings in an integrated synthesis. Support from a parent with first-hand experience able to empathise with problems and challenges may help. These feelings can lead to anxiety, depression and post-traumatic stress which may persist long after discharge from the unit. Feelings of helplessness, fear, sadness, guilt, grief and anger are common. Parents of babies admitted to neonatal units experience an arduous emotional journey.
