On April 2, 2026, Peri, a women’s health and data company, launched the first wearable device specifically engineered to monitor perimenopause, according to a press release from the company. The system utilizes continuous biometric tracking to provide an objective assessment of physiological changes over time, offering actionable insights for symptom management and clinical care. The data collected through this platform represented the 1st large-scale dataset on perimenopause, a transition that has historically been under-researched within the health care system.¹
Perimenopause remains one of the most common and least understood areas of medicine, characterized by symptoms such as vasomotor symptoms, sleep disruption, anxiety, brain fog, and joint pain. Clinical data indicated that as a women reach this transition, they may notice changes in menstrual flow and frequency caused by the erratic production of hormones and less-frequent ovulation from the ovaries, according to The Menopause Society.² In the beginning of perimenopause, these changes are often subtle, such as cycles becoming a little shorter, whereas the late transition may involve skipping periods for 60 days or more, the women’s health society noted.
The device was made available for purchase at a price of $449, with the company noting that the product required no subscription fees and was eligible for Flexible Spending Account (FSA) and Health Savings Account (HSA) funds.¹ Statistics cited by the company showed that although 60% of women sought clinical help for perimenopausal symptoms, 70% left those encounters without answers. Historical gaps in research were noted, as women were not required to be included in clinical research in the United States until 1993. Further, contemporary medical training for doctors often included only 0 to 2 hours of instruction on menopause.
"We built Peri because women deserve to see what's actually happening in their bodies, not second-guess their own experience or rely on a system that wasn't built for them," said Heidi Davis, co-founder and CEO of Peri.
The Menopause Society noted that tracking bleeding patterns on a calendar or smartphone app is essential for health care professionals to accurately assess whether changes in uterine bleeding are of concern.²
The hardware consists of what Peri denotes as a “small, lightweight sensor worn under the breast, designed for continuous wear through exercise, sleep, and showering.”1
This location allows the sensor to capture vasomotor symptoms, including hot flashes and night sweats. Vasomotor symptoms are the most commonly reported issues during the menopause transition, with 1 large study finding that up to 80% of women experience them.² These episodes are characterized by a sudden, intense sensation of heat in the upper body and typically last between 1 and 5 minutes.
The company spent 5 years developing its artificial intelligence platform, ensuring every algorithm was trained exclusively on continuous data collected from women experiencing perimenopause.¹ A companion application translated this raw biometric data into a detailed picture of how symptoms, sleep, mood, and activity levels were interconnected.
The scope of the project extended beyond immediate symptom tracking, as perimenopause represents a physiological turning point linked to long-term health outcomes in cardiovascular health, bone density, and cognitive function. Cognitive symptoms, often referred to as brain fog, are reported by 40% to 60% of midlife women.² These symptoms manifest as difficulty remembering words or names and an inability to concentrate, though clinical experts noted that these changes are typically mild, with dementia at midlife considered to be “very rare,” according to The Menopause Society.
By maintaining a comprehensive record over time, the technology was designed to identify potential risk factors years before they developed into chronic conditions.¹ The provided Peri kit contained the wearable device, 2 rechargeable batteries, 20 adhesives, 1 charger, and 1 USB cable.
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