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Odds ratio (OR) for clinical pregnancy rates for RCTs comparing 100 vs. 200 IU recFSH. Circles represent point estimates of OR. Circle size is proportionate to number of patients. The 95%CI are illustrated by error bars. The overall OR was calculated using the Peto method. There was no statistically significant heterogeneity between the studies (χ2 = 1.97; P = 0.74)
