Comparison 5. Letrozole compared to FSH.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Ovarian hyperstimulation syndrome rate	1		Risk Difference (M‐H, Fixed, 95% CI)	Totals not selected
2 Clinical pregnancy rate	1	140	Odds Ratio (M‐H, Fixed, 95% CI)	0.82 [0.40, 1.67]
3 Miscarriage rate by woman randomised	1		Odds Ratio (M‐H, Fixed, 95% CI)	Totals not selected
4 Miscarriage rate by pregnancies	1		Odds Ratio (M‐H, Fixed, 95% CI)	Totals not selected
5 Multiple pregnancy rate	1	140	Odds Ratio (M‐H, Fixed, 95% CI)	0.19 [0.01, 4.12]