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. 2013 Apr 30;2013(4):CD003552. doi: 10.1002/14651858.CD003552.pub4

4.2. Analysis.

Comparison 4 Skin patch releasing norelgestromin 150 µg + EE 20 µg versus COC desogestrel 150 µg + EE 20 µg, Outcome 2 Kaplan‐Meier cumulative pregnancy rates (95% CI).

Kaplan‐Meier cumulative pregnancy rates (95% CI)
Study Outcome Skin patch COC
Urdl 2005 6‐cycle rate 0.5 (0 to 1.0) 0.3 (0 to 0.8)
Urdl 2005 13‐cycle rate 0.5 (0 to 1.0) 0.3 (0 to 0.8)