Natural Cycles For Healthcare Providers

Clinical effectiveness

NC° Birth Control’s effectiveness and safety has been demonstrated across 10 peer-reviewed clinical studies, including one of the largest analyses of its kind. The real life effectiveness of the method remains inline with published rates.

Includes unintended pregnancies that occur due to having unprotected sex or using withdrawal on a fertile day, as well as pregnancies that occur while the method is used as intended.

Includes pregnancies that occur due to failure of a barrier method, or the algorithm assigning an incorrect non-fertile day.

References: FDA De Novo DEN170052.

More about effectiveness

NC° Birth Control Pearl Index

7 out of 100 became pregnant within one year

5 from incorrect use (unprotected intercourse on fertile days)

2 despite perfect use

of which 0.5 from app incorrectly identifying a non-fertile day

How NC° Birth Control works

The AI-enhanced algorithm behind the app confirms each user’s daily fertility status by analyzing temperature data, menstrual data & optional LH tests. To prevent pregnancy, users agree to abstain or use protection on fertile days.

How biometric data is collected

Data auto-syncs to the Natural Cycles app

NC° Thermometer

Measure upon waking, sync via Bluetooth

Oura Ring

Monitors temperature trends during sleep

Apple Watch

Monitors temperature trends during sleep

Read the science behind NC°

Patient eligibility

NC° Birth Control may be a good option for those seeking a non-hormonal, non-invasive birth control method.

NC° Birth Control is suitable for those who:

Are 18 years or older
Agree to use protection or abstain on fertile days
Cannot tolerate hormonal contraception
Currently use a period tracker or less effective method

Comparison of contraceptive effectiveness data

NC° Birth Control is more effective than calendar-based FABMs and is in the same effectiveness category as the pill.

NC° Birth Control

93% Typical use

98% Perfect use

IUD

>99%Typical use

>99%Perfect use

Contraceptive pill

93%Typical use

>99%Perfect use

Natural Cycles°

93%Typical use

98%Perfect use

Male condom

87%Typical use

98%Perfect use

Pull out method

80%Typical use

96%Perfect use

Calendar method

88%Typical use

95%Perfect use

Percentage of typical/perfect users who did not get pregnant with the method over one year of use. Reference: Contraceptive Technology (Table 5-2). 22nd Edition, 2023

Meet the NC° Medical Advisory Board

Learn more

Dr. Karen Tang

MD, MPH, FACOG
NC° Medical Advisory Board

"I was absolutely amazed at the amount of research and data that has gone into the creation of the NC° app. They're using cutting-edge technology and science to provide a birth control method that those seeking a hormone-free option deserve."

Dr. Barbara Levy

MD, FACOG, FACS, MSCP
NC° Medical Advisory Board

"For far too long women have had few dependable, hormone-free birth control options, so I'm excited to partner with Natural Cycles to offer a valuable non-hormonal choice for those seeking it."

Access educational resources

Download printable resources developed by the Natural Cycles Medical & Science Team.

Request a specific resource

Patient brochure

Educate patients on how NC° Birth Control works and if it’s right for them.

NC° Birth Control quick guide

Learn about how NC° Birth Control works and see who’s eligible.

Effectiveness chart

Help your patients make informed decisions about contraceptive options.

User manual

Improve patient safety to ensure proper usage of NC° Birth Control.

Backed by research

Our dedicated on-staff Medical & Research Team has published over 20 peer-reviewed studies, advancing our mission to empower women and further the field of female health.

See all publications