Comparison 2. 30 ug ethinyl estradiol and 150 ug desogestrel, 28‐day versus 70‐day cycles for one year.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
2.1 Overall discontinuation	1	294	Peto Odds Ratio (Peto, Fixed, 95% CI)	1.43 [0.87, 2.36]
2.2 Discontinuation for bleeding reasons	1	294	Peto Odds Ratio (Peto, Fixed, 95% CI)	3.59 [1.57, 8.22]
2.3 Pregnancy	1	294	Peto Odds Ratio (Peto, Fixed, 95% CI)	Not estimable