Comparison 9. EE 20 µg and levonorgestrel 100 µg versus EE 35 µg and norgestimate 180‐215‐250 µg.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Pregnancy per woman	1	309	Peto Odds Ratio (Peto, Fixed, 95% CI)	0.37 [0.05, 2.63]