Leading women’s health platform Flo Health spotlights the overlooked link between perimenopause and workplace productivity.
The Flo Health app, the world’s leading women’s health platform and the first European femtech unicorn, is expanding its science-backed features to address one of the most under-discussed challenges in modern healthcare: perimenopause and its impact on women’s productivity. As women in their 30s, 40s, and 50s navigate hormonal transitions that can affect their energy, focus, and mood, Flo Health is using research, technology, and expert insight to fill this long-overlooked gap.
With 77 million monthly active users worldwide, Flo Health remains the number one OB-GYN-recommended app for period and cycle tracking, fertility, and reproductive health. Its newest feature, Flo for Perimenopause, aims to help women better understand and manage the changes that accompany this stage of life.
According to Flo Health’s 2025 research, perimenopause-related productivity losses cost the U.S. economy an estimated $22 billion each year. The impact is measurable across all levels of the workforce. Women aged 45 to 54 with mild symptoms lose approximately $1,978 in annual productivity, those with moderate symptoms lose about $7,512, and those with severe symptoms face losses reaching $16,724 per year. These findings highlight the economic and societal cost of ignoring women’s midlife health needs—particularly as the millennial generation becomes the largest segment of the global workforce.
The Flo for Perimenopause feature introduces the Peri Score Quiz, an interactive assessment designed to evaluate symptom severity and deliver personalized, evidence-based recommendations. These recommendations are developed through the expertise of more than 100 medical specialists, ensuring women receive information grounded in current clinical research.
Flo’s clinical credibility extends beyond app design. The company’s data has become a valuable resource for global women’s-health research, including a 2024 peer-reviewed study published in Frontiers in Global Women’s Health that analyzed hormonal and cycle-length variability across millions of anonymized users. The research helped redefine how clinicians understand menstrual-cycle regularity and its connection to reproductive and endocrine health, demonstrating Flo’s potential not only to empower individuals but also to advance the medical community’s understanding of women’s physiology at scale.
Read: Why Flo App Research Is Driving Long-Term Advances in Women’s Health
At the center of this initiative is Dr. Sameena Rahman, MD, FACOG, IF, MSCP, board-certified OB/GYN, Menopause Certified Practitioner, and Flo Health Medical Advisor. Dr. Rahman, an ISSWSH Fellow and founder of the GYN & Sexual Medicine Collective, is also a clinical assistant professor of obstetrics and gynecology at Northwestern University’s Feinberg School of Medicine. Her work emphasizes evidence-based, patient-centered care across every stage of a woman’s life, from menstrual health to menopause.
In an interview on behalf of Flo Health, Dr. Rahman explained that perimenopause can begin as early as a woman’s mid-30s, with symptoms such as brain fog, fatigue, mood swings, and disrupted sleep patterns that often go misdiagnosed or dismissed. She encouraged women to take a proactive role in understanding their health through resources like Flo’s Peri Score Quiz and the app’s personalized educational content.
Beyond its new feature, Flo Health continues to champion user privacy and global accessibility. Its Anonymous Mode—recognized as one of TIME’s Best Inventions 2023 and a Fast Company World Changing Ideas Awards finalist—demonstrates the company’s commitment to ensuring women can manage their health data safely and securely. Through its Pass It On Project, Flo has donated more than 20 million premium subscriptions toward its goal of giving free access to one billion women worldwide.
By combining cutting-edge research, medical expertise, and ethical technology, Flo Health is redefining how digital tools can empower women to navigate perimenopause with confidence, accuracy, and community support.
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