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Effect of luteal phase support with vaginal progesterone on pregnancy outcomes in natural frozen embryo transfer cycles: A meta-analysis

  • Seol, Aeran (Department of Obstetrics and Gynecology, Seoul National University Hospital) ;
  • Shim, Yoo Jin (Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital) ;
  • Kim, Sung Woo (Department of Obstetrics and Gynecology, Seoul National University Hospital) ;
  • Kim, Seul Ki (Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital) ;
  • Lee, Jung Ryeol (Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital) ;
  • Jee, Byung Chul (Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital) ;
  • Suh, Chang Suk (Department of Obstetrics and Gynecology, Seoul National University Hospital) ;
  • Kim, Seok Hyun (Department of Obstetrics and Gynecology, Seoul National University Hospital)
  • Received : 2019.07.01
  • Accepted : 2019.11.11
  • Published : 2020.06.30

Abstract

Objective: The purpose of this study was to determine the effect of vaginal progesterone for luteal phase support (LPS) on the clinical pregnancy rate (CPR) in natural frozen embryo transfer (FET) cycles via a meta-analysis. Methods: We performed a meta-analysis of randomized controlled trials (RCTs) and retrospective studies that met our selection criteria. Four online databases (PubMed, Embase, Medline, and the Cochrane Library) were searched between January 2017 and May 2017. Studies were selected according to predefined inclusion criteria and meta-analyzed using R software version 2.14.2. The main outcome measure was CPR. Results: A total of 18 studies were reviewed and assessed for eligibility. One RCT (n = 435) and three retrospective studies (n = 3,033) met the selection criteria. In a meta-analysis of the selected studies, we found no significant difference in the CPR (odds ratio [OR], 0.96; 95% confidence interval [CI], 0.60-1.55) between the vaginal progesterone and control groups. An analysis of the two retrospective cohort studies that reported the live birth rate (LBR) following FET showed a significantly higher LBR in the vaginal progesterone group (OR, 1.72; 95% CI, 1.21-2.46). A subgroup meta-analysis of FET conducted 5 days after injection of human chorionic gonadotropin showed no significant differences between the two groups with regard to the CPR (OR, 1.18; 95% CI, 0.90-1.55) or miscarriage rate (OR, 0.73; 95% CI, 0.36-1.47). Conclusion: The results of this meta-analysis of the currently available literature suggest that LPS with vaginal progesterone in natural FET cycles does not improve the CPR.

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References

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