Updates in Hormonal Emergency Contraception

@article{Shrader2011UpdatesIH,
  title={Updates in Hormonal Emergency Contraception},
  author={Sarah P. Shrader and Larissa N. Hall and Kelly R. Ragucci and Sally Rafie},
  journal={Pharmacotherapy: The Journal of Human Pharmacology and Drug Therapy},
  year={2011},
  volume={31}
}
In recent years, there have been many updates in hormonal emergency contraception. Levonorgestrel emergency contraception has been available for several years to prevent pregnancy when used within 72 hours after unprotected intercourse or contraceptive failure, and it was recently approved for nonprescription status for patients aged 17 years or older. Current research suggests that the primary mechanism of action is delaying ovulation. Ulipristal is the newest emergency contraception… 
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TLDR
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