How Does Natural Cycles Work as a Contraceptive Option?

Measure your temperature first thing in the morning, enter it into the intelligent app and know when you need to use protection or abstain from sex to prevent a pregnancy.

Key takeaways:

  • There’s an important connection between your body temperature and your fertility
  • For the app to work as a contraceptive method, you must provide your temperature most mornings
  • Check your fertility status every day in the Natural Cycles intelligent app

Your basal body temperature tells us when you’re fertile

After ovulation happens in the menstrual cycle, there is a detectable rise in basal body temperature caused by hormones. Basal body temperature, or BBT, is the body’s lowest resting temperature which you can measure first thing in the morning when you wake up. To measure this small, yet significant, rise in BBT you need a thermometer which shows 2 decimal places.

The intelligent way to measure

The Natural Cycles intelligent app uses an algorithm which analyses basal body temperature to tell you when you can or can’t get pregnant. To use Natural Cycles you need to add it to your morning routine. Measure in your mouth as soon as you wake up. You should aim to do this at least 5 days a week. Add your temperature and your period data into the app, you can also input additional info like LH test results and sex. It’s not essential to share all this information, but it can help the algorithm get to know your unique cycle

Check your fertility status every day

After measuring, you should check your fertility status for the day. This is shown in the app as a green or a red day. A green day means you are not fertile and can’t get pregnant, a red day means you are fertile and there is a risk of pregnancy. On red days you should either use a condom or abstain from having sex. You can also see a forecast of your fertility in the calendar view, this only gives a prediction and you should always check your daily fertility status. Natural Cycles does not protect against STIs.

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