Nowadays which emergency contraception? Comparison between past and present: latest news in terms of clinical efficacy, side effects and contraindications

@article{Gizzo2012NowadaysWE,
  title={Nowadays which emergency contraception? Comparison between past and present: latest news in terms of clinical efficacy, side effects and contraindications},
  author={Salvatore Gizzo and Tiziana Fanelli and Stefania Di Gangi and Carlo Saccardi and Tito Silvio Patrelli and Alessandra Zambon and Ani bt. Omar and Donato D'Antona and Giovanni Battista Nardelli},
  journal={Gynecological Endocrinology},
  year={2012},
  volume={28},
  pages={758 - 763}
}
Despite many highly effective methods of contraception are available nowadays, many pregnancies are unintended. Emergency contraception (EC) is the use of drug or device after unprotected intercourse to prevent an unwanted pregnancy. It is a woman’s last chance to prevent unintended pregnancy. Nevertheless the confusion about mechanisms of action, side effects, clinical efficacy and controindications makes the intervention underused in every setting investigated. So far levonorgestrel (LNG) has… 
Ulipristal Acetate
The effectiveness of emergency contraception (EC) is usually estimated by comparing the number of observed pregnancies to that of expected pregnancies after unprotected intercourse. Second-generation
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References

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TLDR
Evidence is provided that UPA, a new type of second-generation progesterone receptor modulator, represents a new evolutionary step in EC treatment and is in line with results from a series of clinical trials conducted recently which demonstrate that U PA seems to have higher EC efficacy compared to LNG.
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An overview of the history of EC methods and the current availability of oral and intrauterine EC methods is provided and Clinicians should be aware of all available options in order to counsel women in need of EC appropriately.
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TLDR
Mifepristone middle dose (25-50 mg) was superior to other hormonal regimens and Levonorgestrel was more effective than the Yuzpe regimen in preventing pregnancy.
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TLDR
The female menstrual cycle comprises three distinct phases: follicular, ovulatory, and luteal; ulipristal acetate was developed to be a derivative of 19-norprogesterone, and the drug is used to prevent unintended pregnancy for up to five days after unprotected intercourse or contraceptive failure.
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TLDR
Review of the evidence suggests that LNG-ECPs cannot prevent implantation, and the Statement based on seven reference papers which considered a total of only 142 patients, divided into still different subgroups got quite different conclusions.
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TLDR
Ulipristal acetate is effective and well-tolerated for emergency contraception 48–120 hours after unprotected intercourse, and this results satisfy the protocol-defined statistical criteria for success.
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TLDR
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