Take control of your fertility with Natural Cycles

Fertility is a deeply personal journey, and for generations, women have relied on hormonal contraception, physical barriers, and limited information to manage their reproductive health. But today, with the fusion of science and technology, there’s a smarter, natural way to understand and take control of your fertility. That’s where Natural Cycles, the world’s first FDA-cleared birth control app, comes in.

Natural Cycles empowers individuals with accurate, hormone-free insights into their unique cycle. Whether you’re trying to prevent pregnancy, conceive, or just understand your body better, this digital solution offers personalized, science-backed support.

What is Natural Cycles?

Natural Cycles is a fertility awareness app developed by physicist Dr. Elina Berglund and her husband Dr. Raoul Scherwitzl. Using a sophisticated algorithm and your daily body temperature, Natural Cycles identifies your fertile and non-fertile days. It provides a hormone-free method of contraception and is also widely used for planning pregnancy or monitoring menstrual health.

The app functions by analyzing basal body temperature (BBT)—the lowest body temperature in a 24-hour period, usually taken first thing in the morning—and other optional indicators such as luteinizing hormone (LH) test results. With this data, the algorithm predicts ovulation and the fertile window.

Why Choose Natural Cycles?

1. Hormone-Free Birth Control

One of the most significant benefits of Natural Cycles is that it’s completely hormone-free. Many women experience unwanted side effects from hormonal birth control methods like the pill, IUD, or injections. These can include weight gain, mood swings, depression, loss of libido, and more.

Natural Cycles offers an alternative that respects your body’s natural rhythm without altering it chemically. For women looking for a non-invasive method that doesn’t interfere with hormonal balance, this app is a game-changer.

2. Cleared by the FDA

Natural Cycles is not just another app; it’s the first digital contraceptive cleared by the FDA in the U.S. This recognition ensures it meets stringent regulatory standards for safety and efficacy.

Clinical studies have shown that Natural Cycles has a typical use effectiveness rate of 93% and perfect use rate of 98%, which is comparable to other popular birth control methods.

3. Dual Purpose: Prevent or Plan Pregnancy

Whether you're trying to avoid pregnancy or start a family, Natural Cycles adjusts based on your goals. Users can easily switch between “Prevent”, “Plan”, and “Follow” (for tracking post-pregnancy or menopause) modes, making the app flexible and supportive through every stage of your reproductive life.

How Does Natural Cycles Work?

Step 1: Measure Your Temperature

Users take their BBT each morning using a basal thermometer or the Natural Cycles integration with wearable devices like the Oura Ring. It’s important to measure at the same time each day before getting out of bed for optimal accuracy.

Step 2: Enter Data into the App

Enter your temperature and any optional data such as menstruation days, LH test results, or symptoms into the app. Over time, the algorithm becomes more accurate as it learns about your personal cycle.

Step 3: Receive Daily Fertility Status

Natural Cycles will display a color-coded calendar:

Green Days = Not fertile

Red Days = Fertile

If you’re using the app to prevent pregnancy, use protection or abstain on red days. If you’re planning to conceive, those red days are your window of opportunity.

The Science Behind Natural Cycles

The Natural Cycles algorithm uses proprietary technology based on statistical modeling and real biological markers to predict ovulation. It considers:

• Basal body temperature patterns
• Menstrual cycle regularity
• Sperm survival data (typically 3–5 days)
• Ovulation timing variation
• LH test results (optional input)

Clinical data from over 20,000 women shows a clear correlation between the accuracy of BBT tracking and fertility prediction. The more consistent the data input, the more personalized and accurate the predictions become.

Empowering Your Choices

Natural Cycles is not just an app—it’s a movement toward body literacy and reproductive empowerment. In an age when women seek more control, personalization, and transparency in healthcare, Natural Cycles delivers a unique and intelligent solution.

By combining scientific precision, modern technology, and user-friendly design, it helps people take charge of their fertility naturally and confidently.

Final Thoughts:

If you're looking for a natural, non-invasive, scientifically backed way to manage your fertility—Natural Cycles may be the ideal solution. It offers:

• Freedom from hormones
• A deeper connection with your body
• Personalized insights
• A proven track record of reliability

Whether you're avoiding pregnancy, trying to conceive, or just want to understand your cycle better, Natural Cycles provides the knowledge and tools to support your journey.

Take control. Stay informed. Trust your body—with Natural Cycles.