via TechCrunch
Two Stanford Grads Raise $11M to Build a Noninvasive Wearable for Hormone Tracking
Stanford graduates Jenny Duan and Abhinav Agarwal are tackling two tough challenges: designing an appealing wearable and accurately measuring hormones to help women better understand their health. Their startup, Clair Health, has raised $11.6 million in a funding round led by Khosla Ventures, with participation from a16z speedrun, Brydge Club, Treehub, Cartan Capital, AGI House, Insiders VC, Anne Wojcicki, and Stephanie Coleman.
Clair Health’s wearable tracks inflammation, bloating, energy levels, and menstrual cycle phases to provide insights into cycle irregularities, perimenopause, and hormonal fluctuations. The device uses voice-based onboarding to gather personalized health data and employs proprietary AI to analyze voice biomarkers, determining a user’s cycle phase after just a few minutes of conversation.
“We found that in women’s health apps, users can’t communicate many symptoms because apps are built for specific ones. With our voice stack, we give users a way to express their problems in their own words,” Duan explained.
Unlike typical wearables like the Apple Watch or Pixel Watch, which rely on gyroscopes, PPG sensors, and temperature sensors, Clair Health’s device features 10 biosensors, including a novel biomagnetic sensor designed for hormonal insights. This allows continuous monitoring across all four menstrual cycle phases, not just menstruation. The app displays information on aging pace, inflammation, bloating, and rate of perceived exertion.
“Until now, no device—invasive or noninvasive—could capture real-time hormonal insights and get to the root of a problem. We didn’t start by designing hardware; we just wanted to track hormones continuously,” Duan told TechCrunch.
Clair Health also aims to support women seeking care for menopause and perimenopause by providing objective data to share with healthcare providers, reducing reliance on oral symptom recounts. Duan became interested in women’s health while working at a nonprofit in Portland, Oregon, and later met Agarwal in a Stanford class focused on women’s health and nonprofits.
As of 2026, the company is building its first-generation wearable and plans to launch a beta program later this year, targeting women who struggle with cycle irregularities or are entering perimenopause.