Stanford Startup Raises $11M for Wrist-Based Hormone Tracking

Clair Health has closed an $11 million funding round to commercialize noninvasive hormone measurement from a wearable wristband. The device addresses a long-standing gap in consumer health hardware—direct hormonal insight without blood draws. CEO Jenny Duan leads the Stanford-founded team. Target use cases include menstrual cycle monitoring, fertility awareness, and perimenopause tracking. How the technology achieves hormone detection at physiologically relevant concentrations remains undisclosed.