1. Oral contraceptive pretreatment significantly reduces ongoing pregnancy likelihood in gonadotropin-releasing hormone antagonist cycles: an updated meta-analysis 
Georg Griesinger, M.D., Ph.D., Efstratios Michaelis Kolibianakis, M.D., Ph.D., Christos Venetis, M.D., M.Sc., Klaus Diedrich, M.D., Ph.D., Basil Tarlatzis, M.D., Ph.D. 
Fertility and Sterility 
Volume 94, Issue 6, Pages (November 2010)
DOI: /j.fertnstert
Copyright © 2010 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Relative risks and weighted mean differences with 95% confidence intervals (CI) for the outcomes. (A) Ongoing pregnancy per randomized patient; (B) duration of stimulation (days); (C) gonadotropin consumption (IU); (D) number of cumulus–oocyte complexes. OCP = oral contraceptive pill; n = number of patients; WMD = weighted mean difference; d = days; M-H = Mantel-Haenszel; IV = inverse variance.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2010 American Society for Reproductive Medicine Terms and Conditions