1. Endometrial scratch injury before intrauterine insemination: is it time to re-evaluate its value? Evidence from a systematic review and meta-analysis of randomized controlled trials 
Amerigo Vitagliano, M.D., Marco Noventa, M.D., Gabriele Saccone, M.D., Salvatore Gizzo, M.D., Salvatore Giovannni Vitale, M.D., Antonio Simone Laganà, M.D., Pietro Salvatore Litta, M.D., Carlo Saccardi, M.D., Giovanni Battista Nardelli, M.D., Attilio Di Spiezio Sardo, M.D. 
Fertility and Sterility 
Volume 109, Issue 1, Pages e4 (January 2018)
DOI: /j.fertnstert
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2. Figure 1
Endometrial scratch versus no intervention. (A) Clinical pregnancy rate. (B) Ongoing pregnancy rate. (C) Multiple pregnancy rate. (D) Miscarriage rate. (E) Ectopic pregnancy rate.
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3. Figure 2
Endometrial scratch in the same cycle versus no intervention. (A) Clinical pregnancy rate. (B) Ongoing pregnancy rate.
Fertility and Sterility  , e4DOI: ( /j.fertnstert )
Copyright © 2017 American Society for Reproductive Medicine Terms and Conditions

4. Supplemental Figure 1 PRISMA flow diagram.
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5. Supplemental Figure 2
Risk of bias graph. The authors' judgment about each risk of bias item presented as percentages across the included studies.
Fertility and Sterility  , e4DOI: ( /j.fertnstert )
Copyright © 2017 American Society for Reproductive Medicine Terms and Conditions

6. Supplemental Figure 3
Endometrial scratch in the preceding cycle versus no intervention: clinical pregnancy rate.
Fertility and Sterility  , e4DOI: ( /j.fertnstert )
Copyright © 2017 American Society for Reproductive Medicine Terms and Conditions

7. Supplemental Figure 4
Endometrial scratch in the same cycle versus endometrial scratch in the preceding cycle: clinical pregnancy rate.
Fertility and Sterility  , e4DOI: ( /j.fertnstert )
Copyright © 2017 American Society for Reproductive Medicine Terms and Conditions