1. Oral contraceptive pill pretreatment in ovarian stimulation with GnRH antagonists for IVF: a systematic review and meta-analysis 
George Griesinger, M.D., Christos A. Venetis, M.D., Tanja Marx, Klaus Diedrich, M.D., Ph.D., Basil C. Tarlatzis, M.D., Ph.D., Efstratios M. Kolibianakis, M.D., Ph.D. 
Fertility and Sterility 
Volume 90, Issue 4, Pages (October 2008)
DOI: /j.fertnstert
Copyright © 2008 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Flow diagram for meta-analysis. Identification and selection of publications.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2008 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2
Odds ratios and weighted mean differences for the outcomes: (A) ongoing pregnancy per randomized patient; (B) duration of gonadotropin exposure (days); (C) gonadotropin consumption (international units); (D) number of cumulus–oocyte complexes. Abreviations: OCP = oral contraceptive pill; n = number of patients; OR = odds ratio; M = mean; SD = standard deviation; WMD = weighted mean difference; d = days; IU = international units.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2008 American Society for Reproductive Medicine Terms and Conditions