Testing Natural Cycles birth control effectiveness
This study tests how well the Natural Cycles app works as a birth control method by tracking your menstrual cycle and identifying fertile days. You'll use only this app to avoid pregnancy for 13 months and share daily data to help researchers understand if it's reliable.
Summary written for real people, not researchers, by Clin2.
Who can take part
- You want to avoid pregnancy for the next 13 months
- You're willing to use only the Natural Cycles app for birth control—no other methods
- You have a regular menstrual cycle between 21 and 35 days and expect to have sex at least once a month
- You don't have permanent contraception (sterilization, implant, or hormonal IUD) and aren't taking certain medications that can harm a developing baby
- You're willing to enter data into the app every day and take pregnancy tests when asked
- You can complete a survey about your experience at the end
Quick eligibility check
Answer a few plain-language questions, based on this study's own requirements, to get a preliminary sense of fit.
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