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To summarize the available data on the benefits of the use of simulation in training obstetric providers.Although simulation is being increasingly used to train obstetric providers, its overall benefit has not been systematically assessed.A systematic search of MEDLINE was performed from May 2011 until April 2017 to identify research evaluating simulation in obstetrics. Data regarding provider type, instructional design, outcomes, and research quality, using the medical education research study quality index (MERSQI) and Newcastle-Ottawa Scale for Education (NOS-E), was abstracted. The average weighted Hedges g effect size was calculated.1423 articles were identified, of which 63 met inclusion criteria. 39 were excluded because they were 1 group pretest-posttest studies (which nearly always show positive effects), and 5 were excluded because they did not contain sufficient information to calculate effect size, leaving 19 articles in the meta-analysis. Of the selected articles 15 were randomized, 3 were nonrandomized, and 1 was a cross-over study. Provider satisfaction was assessed in 2 studies, knowledge in 1, simulated skills in 11, clinical behaviors in 4, and patient effects in 1. The average MERSQI and NOS-E quality scores were 13.3±23 (out of 18) and 5±0.8 (out of 6), respectively. The weighted average effect size for the 19 studies was 0.71 (95% CI, 0.58-0.83).Simulation training in obstetrics is associated with moderate effects in provider satisfaction, knowledge, skills, behaviors, and impact on patients. The effects sizes described here were slightly smaller and methodological quality slightly higher compared to previous meta-analyses in Anesthesiology and Emergency Medicine.