Research Library
Check out our latest research and learn how you’ve helped us further the field of female health.
Latest Article
Published Research
Following up on Covid Vaccines' Effect on Menstrual Cycles
Given this first study’s size, and that it only included participants in the US, we decided to follow it up with another, larger, study...
Research at Natural Cycles
Data Insights
How effective is Natural Cycles when used with the Oura Ring?
The short answer: 93% effective with typical use and 98% effective with perfect use, i.e. the same as if used with a basal thermometer.
Published Research
Menstrual Cycle Myth-Busting
There are many assumptions about the menstrual cycle, and some of the most common ones are that a regular menstrual cycle is 28 days long, with ovulation happening on day 14 and a 14-day luteal phase.
Published Research
How Effective is Natural Cycles as Birth Control?
Effectiveness is always at the core of any birth control method. The standard measurement of contraceptive effectiveness is called the Pearl Index.
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Our peer-reviewed research is published in a top selection of scientific journals.