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A systematic review was conducted to compare the number of retrieved oocytes and fertility outcomes following the administration of different follicle\u2010stimulating hormone medications. Databases were searched from inception to November 2024, including studies that compared two follicle\u2010stimulating hormone medications, including follitropin alfa, follitropin beta, follitropin delta, and urofollitropin. Meta\u2010analyses were performed in random effects models with the restricted maximum likelihood method. From 3867 identified articles, 26 (12613 participants) were included. More oocytes were retrieved with follitropin alfa compared to beta (mean difference 0.64, 95% CI 0.09\u20131.19). Compared to follitropin delta, more oocytes were retrieved with follitropin alfa and beta (1.38, 95% CI 0.09\u20132.67, and 1.40, 95% CI 0.41\u20132.39, respectively); however, higher total doses of follitropin alfa and beta were administered (199.29\u2009IU, 95% CI 43.15\u2013355.43 and 181.08\u2009IU, 95% CI 55.67\u2013306.49, respectively), and the risk of hyperstimulation increased (risk ratios 1.42, 95% CI 1.04\u20131.96 and 1.75, 95% CI 1.15\u20132.70, respectively). More oocytes were retrieved with urofollitropin compared to follitropin beta (1.12, 95% CI \u22121.63 to \u22120.62), with higher total doses of urofollitropin administered (782.32\u2009IU, 95% CI \u22121493.79 to \u221270.85). Variability in ovarian response and hyperstimulation rates across the medications decreased when similar total doses were administered. Fertilization, pregnancy, and live birth rates were similar across the medications, despite differences in the number of retrieved oocytes. Additional research is required to evaluate oocyte quality across follicle\u2010stimulating hormone medications.<\/jats:p>","DOI":"10.1002\/cpt.70014","type":"journal-article","created":{"date-parts":[[2025,7,31]],"date-time":"2025-07-31T12:48:39Z","timestamp":1753966119000},"page":"790-802","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The Type of Follicle\u2010Stimulating Hormone Medication Given for <i>In Vitro<\/i> Fertilization Impacts Oocyte Retrieval: A Systematic Review and Meta\u2010Analysis"],"prefix":"10.1002","volume":"118","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6422-8683","authenticated-orcid":false,"given":"Toni J.F.","family":"Michael","sequence":"first","affiliation":[{"name":"School of Pharmacy, Faculty of Medicine and Health The University of Sydney  Sydney New South Wales 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