What is the efficacy of a cervical cap for contraception?

Updated: Dec 10, 2018
  • Author: Frances E Casey, MD, MPH; Chief Editor: Richard Scott Lucidi, MD, FACOG  more...
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Answer

Answer

Effectiveness depends on the parity of women due to the shape of the cervical os. With perfect use in the first year, the failure rate for nulliparous women is 9%, as opposed to 20% in parous women. With typical use within the first year, the failure rate is 20% in nulliparous women and 40% in parous women.


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