BackgroundEndometriosis is a common gynecological condition with a wide range of symptoms, including infertility, dyspareunia, intestinal disorders, and pelvic pain. Laparoscopy and laparotomy are used widely for diagnosing and managing endometriosis. We will conduct a systematic review and meta-analysis with the aims of reporting complications rates following each type of surgeries for endometriosis and determinants of complications.MethodWe will search Medline (via PubMed), Embase, the Cochrane Library, Web of Science, and Google Scholar for both retrospective and prospective cohorts or trials of at least 30 participants reporting perioperative and postoperative complications for endometriosis surgeries. We will restrict the studies to those conducted after 2011, to be representative of current practices, and will exclude studies of surgeries for gynecological cancer, or other concomitant benign gynecologic surgeries such as myomectomy. Two reviewers will independently screen references and select eligible studies. A standardized form will be used to collect data related to the baseline characteristics, potential determinants of complications, types of interventions, and outcomes. Cumulative incidences of complications will be pooled using DerSimonian and Laird random-effects method. The relation between potential determinants and complications will be reported with risk ratios and their 95% of confidence intervals. Subgroup analysis of surgical approach, surgical procedure, superficial and deep infiltrating endometriosis, and the indication of surgery will be conducted. Sensitivity analyses restricted to studies with low risk of bias will be performed.DiscussionThis systematic review will provide information on the rates of complications for different surgical approaches and procedures for the treatment of endometriosis. It will contribute to inform patients when making decisions regarding their care. Identifying potential determinants of complications will also help to improve care by identifying women being at higher risk of complications.Trial registrationSystematic review registration:CRD42021293865.