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Purpose: Perinatal Ureaplasma infection is associated with a variety of adverse outcomes and neonatal diseases. This meta-analysis is to evaluate current evidence evaluating the association between Ureaplasma and adverse pregnancy outcomes and bronchopulmonary dysplasia (BPD) in preterm infants. Methods: We searched for published articles on Ureaplasma, preterm and BPD in PubMed, the Cochrane Library, and Embase databases posted before August 28, 2021. In addition, the references of these articles were screened. A random/fixed-effect model was used to synthesize predefined outcomes. Results: A total of 19 cohort studies involving 11,990 pregnancy women met our inclusion criteria. Pregnancy Ureaplasma positive increased the risk of preterm birth [odds ratios (OR) 2.76, 95% confidence intervals (CI) 1.63–4.68], BPD (OR 2.39 95% CI 1.73–3.30), chorioamnionitis (OR 2.71, 95% CI 2.02–3.64) and premature rupture of membranes (PROM, OR 2.19, 95% CI 1.34–3.58). Conclusions: Pregnancy Ureaplasma positive may increase the risk of developing preterm birth, chorioamnionitis, PROM and BPD in the preterm infant. The evidence base is, however, of low quality and well-designed studies are needed. [ABSTRACT FROM AUTHOR]