Population Medicine considers the following types of articles:• Research Papers -reports of data from original research or secondary dataset analyses.• Review Papers -comprehensive, authoritative, reviews within the journal's scope.These include both systematic reviews and narrative reviews.• Short Reports -brief reports of data from original research.• Policy Case Studies -brief articles on policy development at a regional or national level.• Study Protocols -articles describing a research protocol of a study.• Methodology Papers -papers that present different methodological approaches that can be used to investigate problems in a relevant scientific field and to encourage innovation.• Methodology Papers -papers that present different methodological approaches that can be used to investigate problems in a relevant scientific field and to encourage innovation.

BACKGROUND:Research suggests some migrant women are at increased risk of mortality and morbidity in the perinatal period; however, there is a gap in co-produced research to improve care. The UK National Institute for Health and Care Research (NIHR) defines co-production as "an approach in which researchers, practitioners, and members of the public work together, sharing power and responsibility". We summarise learnings from our study, which aimed to co-produce solutions to improve maternity care for migrant women in the UK, by working with women to identify the most important research priorities. METHODS:We recruited 18 underserved migrant women living in the UK who had given birth in the UK within the past 15 years to create a patient advisory panel. They were recruited via national and local non-governmental organisations and snowball sampling using purposive methods to ensure representation from a range of backgrounds, including those who were refugees, asylum seekers, and undocumented. Underserved was defined as asylum seeking, refugee, undocumented, or low-income mothers (those who were experiencing homelessness or in receipt of welfare support). The women are involved in conceptualisation, analysis, and dissemination of the project. The project is a UK National Institute of Health and Care Research (NIHR) Doctoral Fellowship project lasting 3 years with a variety of research workstreams. FINDINGS:The research funding application process began in January, 2021, and the project was funded and began in November, 2022. The research team struggled to access comprehensive training on co-production, particularly in how to counter power dynamics. We appointed a Lead Patient Advisor who manages the relationship between the academics and the patient advisors. Additionally, we reimburse women's time, childcare, and travel. We have found that online meetings are preferable, as women do not need to travel or arrange childcare. We meet our patient advisory panel four times per year. Some women have been directly involved in research such as systematic review screening and qualitative interviewing and have been given research training. Our initial research priorities did not align with those of the women, and this helped us to reshape our work. Women said that having a Lead Patient Advisor made it easier to participate, particularly as some issues are traumatic. To mitigate this, we have offered support resources and debriefing. Using online interpreters has been challenging, and we have recently split into different language groups to maximise engagement. INTERPRETATION:Overall, as researchers, we have learned that taking a truly co-produced approach is time-consuming but has ensured our research prioritises the views of migrant women giving birth in the UK. FUNDING:National Institute for Health and Care Research (NIHR).

INTRODUCTION:Women who are migrants and who are pregnant or postpartum are at high risk of poorer perinatal outcomes compared with host country populations due to experiencing numerous additional stressors including social exclusion and language barriers. High-income countries (HICs) host many migrants, including forced migrants who may face additional challenges in the peripartum period. Although HICs' maternity care systems are often well developed, they are not routinely tailored to the needs of migrant women. The primary objective will be to determine what interventions exist to improve perinatal outcomes for migrant women in HICs. The secondary objective will be to explore the effectiveness of these interventions by exploring the impact on perinatal outcomes. The main outcomes of interest will be rates of preterm birth, birth weight, and number of antenatal or postnatal appointments attended.METHODS AND ANALYSIS:This protocol follows the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) Protocols guidelines. EMBASE, EMCARE, MEDLINE and PsycINFO, CENTRAL, Scopus, CINAHL Plus, and Web of Science, as well as grey literature sources will be searched from inception up to December 2022. We will include randomised controlled trials, quasi-experimental and interventional studies of interventions, which aim to improve perinatal outcomes in any HIC. There will be no language restrictions. We will exclude studies presenting only qualitative outcomes and those including mixed populations of migrant and non-migrant women. Screening and data extraction will be completed by two independent reviewers and risk of bias will be assessed using the Quality Assessment Tool for Quantitative Studies. If a collection of suitably comparable outcomes is retrieved, we will perform meta-analysis applying a random effects model. Presentation of results will comply with guidelines in the Cochrane Handbook of Systematic Reviews of Interventions and the PRISMA statement.ETHICS AND DISSEMINATION:Ethical approval is not required. Results will be submitted for peer-reviewed publication and presented at national and international conferences. The findings will inform the work of the Lancet Migration European Hub.PROSPERO REGISTRATION NUMBER:CRD42022380678.

Abstract Background In the UK, one in three births is to a non-UK born woman, but there is a gap in co-produced research to explore their experiences. The National Institute for Health and Care Research (NIHR) defines co-production as ‘an approach in which researchers, practitioners, and members of the public work together, sharing power and responsibility'. This project co-produced a grant proposal to improve maternity care for underserved migrant women in the UK. We reflect on transferrable learning for engaging those whose voices are less often heard in grant writing. Methods An expert by experience, an underserved migrant woman who gave birth in the UK, joined the research team. Four online engagement workshops were conducted; two involved only migrant women, two were multi-disciplinary. 26 underserved migrant women attended. NIHR INVOLVE public involvement guidance was consulted. Results Women said they were often asked about negative experiences which felt disempowering, and rarely asked about solutions. Thus, we shifted the focus of our work to co-designing solutions. Women said that having an expert by experience co-host workshops encouraged engagement, so we integrated this into our methods. Some women were uncomfortable in professional groups. Thus, our proposed steering and focus groups will have an expert by experience subgroup with elected members attending multi-disciplinary groups. We will engage mostly online as women preferred this to enable flexibility with childcare. The lead expert by experience helped form the proposal through brainstorming, co-drafting, and feedback; experts by experience commented on the draft via email and workshops. The lead expert by experience wished to gain further experience of research methods, for which we requested additional funding. Conclusions This project highlights the immense potential for co-production in public health research, and the value of adapting research planning to maximise the voices of the less often heard. Key messages • Engaging experts by experiences in public health research planning is key to ensuring our work addresses the needs of underserved communities. • Co-Production of research requires determination to involve those whose voices are less often heard from the beginning of the research process, and to commit to joined working throughout.