• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia

Trendingnow

1

College-educated women are snapping up the highest-earning men without college degrees, leaving the rest further behind

2

An 11-year-old is cleaning his neighbors' trash cans for $10 each—he now has 100K followers as teens face the worst summer job market since 1948

3

The millennial generation is split in 2: an older crowd with boomer-style comfort, a younger set going 'back to the early 1900s'

1

College-educated women are snapping up the highest-earning men without college degrees, leaving the rest further behind

2

An 11-year-old is cleaning his neighbors' trash cans for $10 each—he now has 100K followers as teens face the worst summer job market since 1948

3

The millennial generation is split in 2: an older crowd with boomer-style comfort, a younger set going 'back to the early 1900s'
Startups & VentureBiotech

Exclusive: A 21-year-old Stanford grad just raised $11 million to put a hormone lab on your wrist

Lily Mae Lazarus
By
Lily Mae Lazarus
Lily Mae Lazarus
Reporter, News
Down Arrow Button Icon
Lily Mae Lazarus
By
Lily Mae Lazarus
Lily Mae Lazarus
Reporter, News
Down Arrow Button Icon
June 17, 2026, 9:00 AM ET
Abhinav Agarwal and Jenny Duan
Clair already has a 25,000-person waitlist and sold out its presale.Courtesy of Clair
Add Fortune on Google for similar content.

Jenny Duan closed her seed round the same week she picked up her diploma.

Recommended Video

Duan, 21, graduated from Stanford University last weekend with a BS in Symbolic systems. She also closed an $11 million seed round for Clair Health, Fortune learned exclusively. Khosla Ventures led the round, with support from a16z Speedrun, Brydge Club, Treehub, Cartan Capital, AGI House, Insiders VC, and Anne Wojcicki. The startup, co-founded with Abhinav Agarwal, is building what it calls the first continuous, non-invasive hormone monitor for women.

Instead of drawing blood or piercing skin, Clair Health’s wearable wristband uses a stack of 10 biosensors—including biomagnetic sensors it says are not found in any competing consumer wearable—to read physiological signals like skin temperature, heart rate variability, and electrodermal activity, then runs those markers through AI models to infer where a woman is in her hormonal cycle. 

“Right now, to measure hormones, you either do a blood test in a lab or you pee on a stick at home,” Duan told Fortune. “Any urine test is also not looking at hormones directly—they’re looking at how your body metabolizes them.”

Clair’s AI correctly identified which phase of the menstrual cycle a woman was in 94% of the time, benchmarked against daily urine samples—the same standard as at-home ovulation strips, not a clinical blood analysis. Independent third-party studies, including one through Stanford, are underway and will eventually put harder numbers on the table.

Other wearable tech companies have been circling this space. Whoop launched women’s hormonal insights in 2025 and expanded it with a women’s-specific blood testing panel this Spring. Smart ring maker Oura launched a proprietary AI model for women’s health in February 2026. And Natural Cycles already powers FDA-cleared birth control through Oura’s temperature sensor. None of it was built from the ground up for hormones though. 

“Much of wearable technology being developed is bro-tech for tech-bros,” Dr. Alex Morgan, partner at Khosla Ventures, said in a statement to Fortune. “This team has identified the larger underaddressed market of women interested in improving their health and wellness through getting insights specifically designed for women.”

The global femtech market is projected to nearly triple from $39 billion in 2024 to $97 billion by 2030. 

Clair Health’s core argument is that the incumbents are retrofitting existing hardware. Its entire sensor architecture exists to model the HPO axis—the hypothalamic-pituitary-ovarian system, the hormonal feedback loop that governs nearly every dimension of female physiology. The company holds provisional patents on that sensor configuration. 

“There’s only so much of a moat you can build with hardware,” Duan acknowledged. “What’s really special is the machine learning approach and the biophysical modeling.”

Clair is launching as a wellness product in November and pursuing FDA clearance later—the faster path to market. The company already has a 25,000-person waitlist and sold out its presale. It has received more than 100 letters of intent from fertility clinics. The longer-term roadmap includes perimenopause monitoring, hormone replacement therapy calibration, and diagnostics for conditions like PCOS and endometriosis.

The company is building toward HIPAA compliance with zero-knowledge encryption and on-device computing for women who don’t want health data stored in the cloud. 

Duan expects to raise more funding in roughly a year.

Subscribe to Fortune Gulf Brief. Every Tuesday, this new newsletter delivers clear-eyed, authoritative intelligence on the deals, decisions, policies, and power shifts shaping one of the world’s most consequential regions, written for the people who need to act on it. Sign up here.
About the Author
Lily Mae Lazarus
By Lily Mae LazarusReporter, News

Lily Mae Lazarus is a news reporter at Fortune.

See full bioRight Arrow Button Icon
Add Fortune on Google for similar content.

Latest in Startups & Venture

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Fortune Secondary Logo
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • World's Most Admired Companies
  • See All Rankings
  • Lists Calendar
Sections
  • Finance
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
  • Group Subscriptions
About Us
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • TikTok icon
  • YouTube icon

Latest in Startups & Venture

econ
AsiaChina
A Chinese chip maker’s shares surged 466% in their first day of trading as AI boom worm turns
By Chan Ho-Him and The Associated PressJuly 27, 2026
6 hours ago
canada
EconomyTariffs
Canada’s awkward tariff summer: Gordie Howe Bridge opens for traffic a week after Michigan and White House officials got uninvited
By The Associated PressJuly 27, 2026
6 hours ago
kimi
AIChina
Meet the American techies who don’t care where ‘good enough’ AI models come from, even China
By Chan Ho-Him, Matt O'Brien and The Associated PressJuly 27, 2026
7 hours ago
How an ex-AWS scientist plans to take on OpenAI and Meta in voice AI models
Startups & VentureTerm Sheet
How an ex-AWS scientist plans to take on OpenAI and Meta in voice AI models
By Sebastian HerreraJuly 27, 2026
9 hours ago
Booted from Malaysia, tech guru Balaji Srinivasan finds a new patron for his ‘nomad’ commune: Kazakhstan
AsiaMalaysia
Booted from Malaysia, tech guru Balaji Srinivasan finds a new patron for his ‘nomad’ commune: Kazakhstan
By Angelica AngJuly 26, 2026
2 days ago
SK chair says Anthropic asked for supplies to make its own chips
AIChips
SK chair says Anthropic asked for supplies to make its own chips
By Ian King and BloombergJuly 25, 2026
2 days ago

Most Popular

College-educated women are snapping up the highest-earning men without college degrees, leaving the rest further behind
Economy
College-educated women are snapping up the highest-earning men without college degrees, leaving the rest further behind
By Mia OsmonbekovJuly 26, 2026
1 day ago
An 11-year-old is cleaning his neighbors' trash cans for $10 each—he now has 100K followers as teens face the worst summer job market since 1948
Success
An 11-year-old is cleaning his neighbors' trash cans for $10 each—he now has 100K followers as teens face the worst summer job market since 1948
By Orianna Rosa RoyleJuly 25, 2026
2 days ago
The millennial generation is split in 2: an older crowd with boomer-style comfort, a younger set going 'back to the early 1900s'
Real Estate
The millennial generation is split in 2: an older crowd with boomer-style comfort, a younger set going 'back to the early 1900s'
By Nick LichtenbergJuly 25, 2026
2 days ago
New York City women are making up to $30,000 per month by renting out their closets to strangers
Retail
New York City women are making up to $30,000 per month by renting out their closets to strangers
By Sarah GlodekJuly 27, 2026
12 hours ago
I've been teaching college students for decades. Most of them can no longer finish a book
Commentary
I've been teaching college students for decades. Most of them can no longer finish a book
By Austin SaratJuly 26, 2026
1 day ago
The Pete behind Jersey Mike’s was only 17 years old when he borrowed $125,000 to buy the chain—with some help from his high school football coach
Success
The Pete behind Jersey Mike’s was only 17 years old when he borrowed $125,000 to buy the chain—with some help from his high school football coach
By Marco Quiroz-GutierrezJuly 26, 2026
1 day ago

© 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.