What is the efficacy injectable DMPA for contraception?

Updated: Oct 06, 2020
  • Author: Frances E Casey, MD, MPH; Chief Editor: Richard Scott Lucidi, MD, FACOG  more...
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DMPA is an extremely effective contraceptive option. Neither varying weight nor use of concurrent medications has been noted to alter efficacy. Within the first year of perfect use, the failure rate is 0.3%.

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