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. Author manuscript; available in PMC: 2018 Dec 1.
Published in final edited form as: Contraception. 2017 Sep 4;96(6):420–425. doi: 10.1016/j.contraception.2017.08.014

Figure 2. The lifetable non-pregnancy probability as a function of the number of cycles.

Figure 2

The 95% Confidence Interval (CI) calculated as suggested by Kalbfleisch and Prentice is indicated (pink band) [23]. The dotted orange line indicates the 13th cycle.