21-year-old Stanford grad raises $11M for a hormone-tracking wearable
Jenny Duan closed an $11.6 million seed round for Clair Health the same week she graduated, building a wristband that tracks hormones continuously without blood draws.
Clair Health has raised an $11.6 million seed round led by Khosla Ventures, with backing from a16z Speedrun and Anne Wojcicki among others. Co-founder Jenny Duan closed the round at 21, the same week she graduated from Stanford with a degree in symbolic systems, alongside co-founder Abhinav Agarwal.
The company is building what it describes as the first continuous, non-invasive hormone monitor for women – a wrist-worn device that infers estrogen, progesterone, LH and FSH activity from physiological signals, without blood draws or urine tests. It's slated to ship as a wellness product in November, with FDA clearance to follow later.
Filling a gap Oura and Whoop left open
Duan has said she started the company after noticing that popular wearables track everything from sleep to heart rate but largely ignore hormones – a signal that shapes energy, mood and fertility across a woman's cycle. It's a bet on a femtech market some projections put near $97 billion by 2030.