Abstract: Objective：To evaluate the effect of dietary patterns on semen quality by a meta-analysis. Methods: This study was conducted in accordance with the Meta-analysis of Observational Studies in Epidemiology (MOOSE) guidelines. All of observational studies assessing the association between dietary patterns and semen quality parameters were searched by PubMed, EMBASE, Web of Science and the Cochrane library databases from inception to June 2018. The studies were screened according to the inclusion and exclusion criteria by two researchers independently, followed by data extraction and quality evaluation. The Stata 12.0 software was used for Meta-analysis. Results: A total of 7 literatures involving 1 873 participants were included. The Meta-analysis results showed that the healthy dieatry pattern was associated with the increased sperm concentration (SMD=0.20, 95%CI: 0.07-0.33, P=0.003), count (SMD=0.27, 95%CI: 0.07-0.46, P=0.008) and progressive motility (SMD=0.46, 95%CI: 0.24-0.69, P＜0.001), and that it was not associated with semen volume (SMD=-0.20, 95%CI: -0.82-0.42, P=0.525), sperm morphology (SMD=-0.01, 95%CI: -0.14-0.12, P=0.890) and total motility (SMD= -0.10, 95%CI: -0.55-0.36, P=0.680). Conclusion: The healthy dietary pattern is beneficial to improve semen quality.

Key words: Meta-analysis, Dietary therapy, Semen analysis, Infertility, male