The story behind Natural Cycles

The idea for Natural Cycles came about when our founders, Elina and Raoul – a married couple – were themselves in search of an effective method of natural birth control.

Elina was part of the team at CERN (European Organisation for Nuclear Research) who discovered the Higgs Boson particle. Raoul also has a background in physics, but had always aspired to be an entrepreneur. The idea for Natural Cycles was first conceived when the couple started to think about starting a family. Elina says, “I knew that I wanted to get pregnant in a year or two and had therefore stopped using hormonal birth control to give my body a chance to get back to normal first. In my search for a natural birth control method, I discovered that the body temperature changes throughout the menstrual cycle – something that is well-known and well-researched. I started analyzing my own temperature, applying my statistical knowledge from particle physics to detect ovulation and map out my fertile days.”

Elina became absorbed by her own fertility data: “The more entrenched I became in my fertility data, the more I was learning about my body. It really did feel like a revelation.” Using the techniques she had learned through the Higgs Boson project, Elina created an algorithm to analyze temperature readings, taking factors like sperm survival, temperature fluctuations, variations in cycle length, and more into account to identify fertile and non-fertile days. “Raoul was the one who suggested that we turn the fertility algorithm into an app, to allow other couples to benefit from our innovation,” says Elina.

Elina and Raoul understood from the beginning that the algorithm behind Natural Cycles could not only help them to prevent a pregnancy– but also to plan a pregnancy when the time was right. In 2013, Elina and Raoul announced on Twitter that they were going to switch from the app’s “Prevent” mode to “Plan” and they didn’t have to wait long for good news. “With a little luck, and the precision of the app, we got pregnant the first cycle,” says Elina. “We are pioneering an era in which women are more aware and in control of their bodies than ever before. We want to empower women to take control of their fertility – whether that’s to prevent or plan a pregnancy.”

Natural Cycles plays a huge role in women's lives, which humbles us. So we always have their best interest at heart in every decision we make

Dr. Elina Berglund
CEO & Founder

Natural Cycles founder & CEO Elina Berglund


Our mission at Natural cycles

Our mission at Natural Cycles is to pioneer women’s health with research and passion – by empowering every woman with the knowledge that she needs to take charge of her health.

The team

Join the Natural Cycles Team

Founded originally in Switzerland, the company now has its headquarters in Stockholm, Sweden and has grown to 80 employees over the past couple of years. We are one of the hottest and fastest growing startups in Sweden, so why not join our team?

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