The sexual and reproductive health and rights (SRHR) of migrants and refugees present important public health challenges. Social and structural determinants affect both the general health and SRHR of migrants, but the drivers of SRHR among migrant and refugee populations remain understudied. Aims To identify upstream social and structural determinants of SRHR health of migrants and refugees reported in systematic reviews. Methods We conducted a systematic review of reviews. We studied 3 aspects

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... of SRHR: sexually transmitted infections, sexual violence and unintended pregnancy in migrants and refugees. We used an inductive approach to synthesize emerging themes, summarized them in a narrative format and made an adapted version of Dahlgren and Whitehead's social determinants of health (SDH) model. Results We included 12 systematic reviews, of which 10 were related to sexually transmitted infections, 4 to sexual violence and 2 to unintended pregnancy. We identified 6 themes that operate at 4 different levels in an adapted version of the Dahlgren and Whitehead SDH model: economic crisis and hostile discourse on migration; limited legal entitlements, rights and administrative barriers; inadequate resources and financial constraints; poor living and working conditions; cultural and linguistic barriers; and stigma and discrimination based on migration status, gender, sex and ethnicity. Conclusion This review provides evidence of how upstream social and structural determinants undermine the SRHR of refugees and migrants. Unless these are addressed in policy-making and planning, the health of migrants and refugees is at risk.