Stanford graduates Jenny Duan and Abhinav Agarwal have raised $11.6 million for their startup Clair Health to develop a noninvasive wearable that monitors hormones to help women track their menstrual cycles and perimenopause.

The device, which uses voice-based onboarding and a host of biosensors including a novel biomagnetic sensor, aims to provide insights into inflammation, bloating markers, energy levels, and cycle phase classification. It also continuously monitors the four phases of menstruation rather than relying solely on the day of menstruation.

Clair Health claims its device can determine the user's cycle phase after just a few minutes of conversation with its AI, which analyzes voice-based biomarkers. This is designed to give users more personalized insights into their hormonal health compared to current apps, which can only track specific symptoms.

The company hopes this wearable will support women in menopause and perimenopause by providing data for healthcare providers, potentially reducing the need for time-consuming oral recounts of symptoms. The device is currently being tested with a closed group of beta users and will be available to pre-order at $369 with a monthly subscription fee.

According to Duan, this approach was inspired by her work with nonprofits in Oregon during her studies, where she met Agarwal. They believe that traditional health-tracking devices like the Apple or Pixel Watch are not sufficient for tracking hormonal health and that their device can provide real-time insights into hormones.