1. Supplementation with progestogens in the first trimester of pregnancy to prevent miscarriage in women with unexplained recurrent miscarriage: a systematic review and meta-analysis of randomized, controlled trials 
Gabriele Saccone, M.D., Corina Schoen, M.D., Jason M. Franasiak, M.D., Richard T. Scott, M.D., H.C.L.D., Vincenzo Berghella, M.D. 
Fertility and Sterility 
Volume 107, Issue 2, Pages e3 (February 2017)
DOI: /j.fertnstert
Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions

2. Fertility and Sterility 2017 107, 430-438. e3DOI: (10. 1016/j
Fertility and Sterility  , e3DOI: ( /j.fertnstert )
Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions

3. Figure 1
Forest plot for the risk of recurrent miscarriage in women with unexplained recurrent miscarriage. df = degrees of freedom; M-H = Mantel-Haenszel.
Fertility and Sterility  , e3DOI: ( /j.fertnstert )
Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions

4. Supplemental Figure 1
Flow diagram of studies identified in the systematic review (PRISMA template).
Fertility and Sterility  , e3DOI: ( /j.fertnstert )
Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions

5. Supplemental Figure 2
Assessment of risk of bias. (A) Summary of risk of bias for each trial; Plus sign = low risk of bias; minus sign = high risk of bias; question mark = unclear risk of bias. (B) Risk of bias graph about each risk of bias item presented as percentages across all included studies.
Fertility and Sterility  , e3DOI: ( /j.fertnstert )
Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions

6. Supplemental Figure 3 Funnel plot for assessing publication bias.
Fertility and Sterility  , e3DOI: ( /j.fertnstert )
Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions