What if women finally had access to real-time hormone data instead of being told their symptoms were “normal,” stress-related, or simply something they had to live with?
For decades, women’s health has operated within a reactive healthcare system that often lacks personalized insight into the hormonal shifts shaping energy, mood, fertility, recovery, sleep, and long-term wellbeing. At the same time, wearable technology has transformed how consumers understand their health, giving people unprecedented visibility into metrics like heart rate variability, sleep quality, activity, and glucose levels. Yet despite the rapid growth of wearables, hormones — arguably one of the most influential systems in the female body—have remained largely inaccessible outside of occasional lab tests or at-home kits.
That gap is exactly what Jenny Duan, CEO and co-founder of Clair, is aiming to address.
In this episode of Reclaim, I sat down with Jenny to discuss the future of women’s health, the rise of personalized healthcare, and how Clair is building what could become the first continuous hormone monitor designed specifically for women. Our conversation explored everything from wearable technology and healthcare innovation to the emotional reality many women face when they feel dismissed within traditional medical systems.
Jenny’s path into women’s health didn’t begin in medicine. Her background spans consumer technology, startups, investing, and the creator economy. Before founding Clair, she worked across early-stage technology companies and spent time supporting founders and emerging brands. But her interest in women’s healthcare began much earlier through nonprofit work supporting women experiencing homelessness and domestic violence.
Through those experiences, she repeatedly saw how difficult it could be for women to access quality healthcare or feel genuinely heard by providers. Over time, she began recognizing a larger systemic issue: women’s health has historically been understudied and underserved.
During her time at Stanford, Jenny became increasingly interested in the funding and research disparities within healthcare. She described being shocked by how many gaps still exist in understanding how common conditions uniquely affect women. Even today, many medical studies continue to rely disproportionately on male data sets, creating blind spots in diagnosis, treatment, and symptom recognition.
As Jenny put it during our conversation, healthcare has often treated women like “smaller men,” rather than accounting for the physiological complexity of female biology.
That realization ultimately became the foundation for Clair.
Over the last decade, wearables have become deeply integrated into everyday life. Devices now track sleep stages, stress levels, cardiovascular activity, fitness recovery, and even glucose. Consumers have grown increasingly comfortable monitoring their health continuously and using that information to make lifestyle decisions.
But according to Jenny, most wearables were never truly built with women in mind.
Generalized devices are designed to function across broad populations, which means many female-specific physiological signals are filtered out as variability or “noise.” As a result, women are often left with health data that fails to fully reflect the hormonal patterns influencing how they feel on a daily basis.
Clair takes a fundamentally different approach. Rather than adapting an existing wearable model, the company designed its device specifically around women’s hormonal health. The wearable tracks four major hormones—estrogen, progesterone, LH, and FSH—which Jenny describes as the “operating system” of the female body because of how deeply they influence everything from mood and metabolism to fertility and recovery.
What makes the technology especially notable is that Clair does not rely on blood, sweat, or saliva testing. Instead, the company uses a biophysical modeling approach that analyzes hormonal patterns through a combination of sensors and algorithms built directly into the wearable itself.
The device contains ten sensors and captures more than 130 biomarkers, allowing the platform to generate a broader picture of physiological health than most current wearables on the market.
One of the most interesting parts of our conversation centered around what happens after the data is collected.
The health and wellness space already suffers from information overload. Consumers have access to dashboards, metrics, and endless streams of data points, but many people still struggle to understand what any of it actually means in the context of their own lives.
Jenny believes the next evolution of healthcare technology is not simply collecting more information, but creating meaningful personalization around it.
That means helping users understand how hormonal fluctuations may affect sleep quality, training performance, mood, recovery, fertility, or symptoms related to conditions like PCOS and endometriosis. Instead of acting as a passive tracker, Clair’s app is designed to translate physiological data into actionable insights that evolve alongside the user’s goals and health patterns.
The long-term vision is to allow women to use the platform for a wide range of use cases, from fertility planning and marathon training to nutrition optimization and longevity-focused wellness protocols. Rather than forcing users to export data into multiple systems or piece together disconnected health insights, Clair aims to centralize those signals into a single personalized experience.
This shift toward contextualized healthcare reflects a broader trend happening across technology and medicine. Consumers increasingly expect products to adapt to their individual needs rather than relying on generalized averages, and healthcare is beginning to move in the same direction.
While the technology itself is impressive, one of the strongest themes throughout the conversation was the emotional side of women’s health.
Many women intuitively feel when something in their body is changing, yet often lack the measurable data needed to validate those experiences in clinical settings. Symptoms may be minimized, misunderstood, or dismissed altogether. That disconnect can create years of frustration and delayed care.
Jenny believes continuous hormone monitoring has the potential to shift that dynamic by giving women greater visibility into their own physiology. Access to real-time hormonal information could help users identify patterns earlier, better understand their symptoms, and advocate more confidently for their healthcare needs.
For women navigating fertility challenges, irregular cycles, perimenopause, or chronic hormonal conditions, that visibility may become especially valuable. Jenny shared one example involving consistently low progesterone levels, which can contribute to fertility struggles but may otherwise go unnoticed without regular tracking.
The broader mission behind Clair is not simply optimization. It is helping women reclaim agency over their own health by making previously invisible data more accessible and understandable.
Launching a wearable company presents challenges far beyond software development alone. Hardware startups must simultaneously solve for manufacturing, industrial design, supply chains, sensor integration, firmware, software infrastructure, and user experience—all while validating the technology itself.
Jenny acknowledged that building hardware is uniquely complex because every design decision affects both functionality and adoption. Clair explored multiple form factors during development, including rings, earrings, necklaces, and armbands, before ultimately landing on a wrist-based device.
The wrist became the smallest viable form factor capable of supporting the number of sensors necessary for the product’s intended level of accuracy. The company also intentionally designed the wearable to feel more like jewelry than medical equipment, which is part of the reason the device does not include a screen.
That design philosophy reflects a growing trend within consumer health technology: people increasingly want products that integrate seamlessly into their daily lives rather than feeling clinical or intrusive.
One of the most surprising moments in our conversation came when Jenny shared Clair’s early traction numbers.
Before shipping its first device, the company has already built a waitlist approaching 20,000 people and secured roughly 5,000 pre-orders. Even more notably, much of that growth has happened organically through social media, podcasts, press coverage, and word-of-mouth sharing within women’s health communities.
Jenny believes that momentum reflects a much larger unmet demand in the market. Women have been searching for more personalized health solutions for years, particularly in areas related to hormones, fertility, perimenopause, and long-term wellness.
The strong response to Clair suggests that women are eager for products designed specifically around their experiences rather than generalized healthcare models that overlook hormonal complexity.
The company has seen particularly strong interest from women navigating fertility journeys and perimenopause, though demand has also emerged from communities focused on PCOS, longevity, and biohacking. Ultimately, Jenny envisions Clair becoming a lifelong health companion that supports women through every stage of life.
As wearable technology continues evolving, healthcare is beginning to move toward a far more proactive and individualized model. Devices like Clair represent an important shift away from occasional snapshots of health and toward continuous visibility into how the body functions over time.
That transition could fundamentally reshape how women approach everything from fertility and symptom management to preventative care and lifestyle optimization. More importantly, it may help close some of the long-standing gaps that have existed within women’s healthcare for decades.
For Jenny, the immediate focus is refining the app experience and ensuring that the insights delivered through Clair feel genuinely useful and actionable for users. Longer term, the company is exploring clinical integrations, FDA pathways, and expanded medical use cases that could further connect consumer health data with healthcare providers.
But beneath all of the technology and innovation is a much simpler idea: women deserve better visibility into their own bodies.
And increasingly, technology may finally be catching up to that reality.
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