New estimates of the effectiveness of the Yuzpe regimen of emergency contraception.

@article{Trussell1998NewEO,
  title={New estimates of the effectiveness of the Yuzpe regimen of emergency contraception.},
  author={James Trussell and Germ{\'a}n Carlos Gonz{\'a}lez Rodr{\'i}guez and Charlotte Ellertson},
  journal={Contraception},
  year={1998},
  volume={57 6},
  pages={363-9}
}
The purpose of this study was to provide new estimates of the effectiveness of the Yuzpe method of emergency contraception and to offer correctly computed estimates of the confidence intervals for estimated effectiveness rates. Through a literature search, seven studies that present the number of women treated and outcome of treatment by cycle day of unprotected intercourse relative to expected day of ovulation were identified. Probabilities of conception by cycle day of intercourse among women… CONTINUE READING

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