Comparison 2. Freeze‐all versus conventional IVF, adverse events per clinical pregnancy.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
2.1 Multiple pregnancy: after first embryo transfer	5	2223	Odds Ratio (M‐H, Fixed, 95% CI)	1.09 [0.87, 1.36]
2.2 Miscarriage: after first embryo transfer	8	2451	Odds Ratio (M‐H, Fixed, 95% CI)	0.82 [0.66, 1.02]