Comparison 1. Operative hysteroscopy versus control in women with otherwise unexplained subfertility and suspected major uterine cavity abnormalities.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Clinical pregnancy	1	94	Odds Ratio (M‐H, Fixed, 95% CI)	2.44 [0.97, 6.17]
1.1 Removal of submucous fibroids only vs no surgery	1	52	Odds Ratio (M‐H, Fixed, 95% CI)	2.04 [0.62, 6.66]
1.2 Removal of mixed submucous‐intramural fibroids vs no surgery	1	42	Odds Ratio (M‐H, Fixed, 95% CI)	3.24 [0.72, 14.57]
2 Adverse events: miscarriage	1	94	Odds Ratio (M‐H, Fixed, 95% CI)	1.54 [0.47, 5.00]
2.1 Removal of submucous fibroids only vs no surgery	1	52	Odds Ratio (M‐H, Fixed, 95% CI)	1.27 [0.27, 5.97]
2.2 Removal of mixed submucous‐intramural fibroids vs no surgery	1	42	Odds Ratio (M‐H, Fixed, 95% CI)	2.0 [0.32, 12.33]