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Efficacy of the 1-year (13-cycle) segesterone acetate and ethinylestradiol contraceptive vaginal system: results of two multicentre, open-label, single-arm, phase 3 trials - ScienceDirect
Pearl index - interpreting number | discussion about pearls index and understanding the meaning of the numbers | By Mukhmohit Singh | Facebook
Recommendation for confidence interval and sample size calculation for the Pearl Index: The European Journal of Contraception & Reproductive Health Care: Vol 8, No 2
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