Figure 1

Meta-analysis comparing IMSI and ICSI for clinical pregnancy rate, expressed as odds ratios (OR) with 95% confidence intervals (CI). Four randomized studies were included. Two studies included male-factor infertility patients (Antinori et al. [11]; Knez et al. [12]), while two studies dealt with unselected patient populations (Wilding et al. [14]; Balaban et al. [13]).