Comparison 5. Letrozole compared to FSH.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
5.1 Live birth	1		Odds Ratio (M‐H, Fixed, 95% CI)	Subtotals only
5.2 Ovarian hyperstimulation syndrome rate	2	236	Risk Difference (M‐H, Fixed, 95% CI)	‐0.03 [‐0.08, 0.01]
5.3 Clinical pregnancy rate	2	236	Odds Ratio (M‐H, Fixed, 95% CI)	0.81 [0.46, 1.43]
5.4 Miscarriage rate per woman	2	236	Odds Ratio (M‐H, Fixed, 95% CI)	0.61 [0.19, 1.92]
5.5 Miscarriage rate per pregnancy	2		Odds Ratio (M‐H, Fixed, 95% CI)	Totals not selected
5.6 Multiple pregnancy rate	2	236	Odds Ratio (M‐H, Fixed, 95% CI)	0.22 [0.04, 1.32]