A new wearable device promises to revolutionize women's hormonal health monitoring. Called Clair Health, it was developed by two Stanford graduates, Jenny Duan and Abhinav Agarwal, who raised $11.6 million to bring a noninvasive bracelet to market that can detect key biomarkers related to menstrual cycle, perimenopause, and inflammation.
The funding round is led by Khosla Ventures with participation from a16z speedrun, Brydge Club, Treehub, Cartan Capital, AGI House, Insiders VC, Anne Wojcicki, and Stephanie Coleman. The company aims to fill a significant gap in the wearable landscape, which currently focuses on general metrics like heart rate or steps, neglecting the complexity of the female endocrine system.
How Clair Health Works
Unlike traditional smartwatches such as Apple Watch or Pixel Watch, which use optical sensors and gyroscopes, Clair Health integrates 10 biosensors, including a novel biomagnetic sensor specifically designed to detect hormonal changes. The device continuously monitors inflammation, energy levels, bloating, and menstrual cycle phase, offering personalized insights into irregularities, perimenopause, and hormonal fluctuations.
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A distinctive feature is voice-based onboarding: users describe their symptoms through speech, and proprietary AI analyzes vocal biomarkers to determine cycle phase within minutes. According to Duan, "current apps don't allow women to communicate a wide range of symptoms because they are built for specific ones. With our voice stack, we give users a way to communicate their own problems in their own way."
Beyond the Menstrual Cycle
Clair Health goes beyond tracking periods. The device also evaluates aging pace, perceived exertion, and provides useful data for managing menopause and perimenopause. The goal is to offer women actionable insights to share with healthcare providers, moving beyond mere symptom recounting. The startup has secured data partnerships granting access to millions of electronic health records and longitudinal data, aiming to build predictive models for conditions like endometriosis, PMDD (premenstrual dysphoric disorder), and perimenopause.
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Availability and Pricing
Clair Health is currently in closed beta testing. Shipments will begin in November at a price of $369, paired with a $9.99 monthly subscription. Preorders are already open. Investor Mary Minno of Treehub comments: "Hormonal health measurement is still archaic: my perimenopausal friends still get blood draws to understand the efficacy of hormone treatments. Clair aims to deliver a product that shines a light on what previously required a blood draw."
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Other startups are exploring different approaches: Level Zero Health focuses on continuous tracking via glucose monitor-style devices, Hormona relies on home tests, while Ourself Health uses AI based on manual logging. Clair Health stands out for its holistic and noninvasive approach, combining advanced sensors and artificial intelligence.
For more on wearables and women's health, check out our article on Apple's summer accessory line. Hormonal health tracking also connects to innovations in AR chips, as seen in Qualcomm Snapdragon Reality Elite. To learn more about biomagnetic sensors, visit the Wikipedia page on biomagnetism.
