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Background Autistic people are at higher risk of adverse pregnancy and birth outcomes and are more likely to experience poorer perinatal mental health when compared to neurotypical people. Previous evidence has highlighted existing barriers autistic people face when accessing suitable care across the perinatal period, a critical time for addressing maternal and child health inequalities. This study aimed to conduct an umbrella review of existing systematic reviews to comprehensively summarise the evidence and answer the question: What is currently known about the experiences of autistic people accessing care during the perinatal period?Methods To ensure that the research accurately reflects the priorities and needs of autistic individuals, each stage of this systematic review was co-produced with experts via lived experience. Seven electronic databases were searched using co-developed search terms. Reviews published between January 1, 2014, and June 23, 2025, were sought. Eligible reviews were independently screened by two reviewers and assessed using the JBI critical appraisal tool. Data were extracted and synthesised thematically. The review was registered with PROSPERO (CRD42024575519).Results After screening 1087 records, ten systematic reviews were included in the analysis. Six themes were identified: 1) Understanding Autism within a Maternity Context, 2) Communication Differences, which led to miscommunications with health professionals, 3) Sensory Processing Differences, which caused overwhelm and affected the ability to communicate needs, 4) Autistic Parenting Experiences, including unique strengths and challenges faced by autistic parents, 5 )The Far-reaching Impacts of Inadequate Care, which spanned across physical and mental health outcomes of autistic parents and 6) Suggestions to Meet Needs, such as autism and maternity specific policy and guidance.Conclusion This umbrella review highlights key findings that have emerged from published systematic reviews on the topic of autistic perinatal care experiences, identifying gaps in evidence and providing direction for future research, policy, and practice provisions.