Your watch tracks your sleep. Your ring tracks your recovery. Fibra, a Toronto startup, wants your underwear to track your cycle. The company launched its sensor-enabled smart underwear on October 5, 2026, aiming to give people a continuous picture of their reproductive health instead of occasional snapshots.
The washable garment follows five signals while you wear it: vaginal pH, discharge patterns, skin temperature, heart rate and heart rate variability (HRV). A detachable electronics module links the fabric sensors to Fibra’s mobile app, which looks for changing patterns over time and generates personalized insights.
Why underwear, and why now
Period and fertility apps rely on cycle history, symptoms and test results. Ovulation tests measure hormones only at the moment you take one. Wrist and finger wearables capture temperature, heart rate and HRV, but they can’t directly measure signals like vaginal pH or discharge. Fibra says that’s the gap a garment worn close to the body can fill.
Because the platform keeps collecting data as the current cycle unfolds, it is designed to respond to changing patterns rather than lean only on past cycles. That could help people with long or irregular cycles, and people trying to conceive who want more context about timing. Fibra calls the approach Continuous Reproductive Monitoring.
The company stresses that the product is meant for reproductive wellness. It is not designed to diagnose or treat medical conditions or to replace medical care.
Four years of development
Founder and CEO Parnian Majd, who studied biomedical engineering at Toronto Metropolitan University and the University of Toronto, started from a personal question. As a teenager she had highly irregular cycles and was later diagnosed with polycystic ovary syndrome (PCOS). “Reproductive health deserves its own continuous data layer,” she said. “Instead of asking women to track more, we want the technology to do more of the tracking in the background.”
The launch follows four years of work across smart textiles, biosensing, wearable electronics and data science. Fibra reports:
- More than 5 million biomarker and physiological data points, and more than 500,000 minutes of real-world wear.
- More than 160 pairs shipped to testers and beta participants, who wore them over eight hours a day on average. About 90% described them as comfortable.
- A community of more than 6,000 women and roughly US$1.7 million raised to date.
The company has done biocompatibility testing and says it is continuing safety and technical validation with clinicians, researchers and textile manufacturers. Over the longer term, it sees anonymized longitudinal datasets giving researchers a view of how reproductive signals change between clinic visits.
How to get one
The Founder’s Edition is available at myfibra.com. The first 50 Founder orders pay $99.99 for the detachable electronics unit and receive two pairs of smart underwear free. After those spots fill, bundles run from $149.99 to $329.99, with free shipping and lifetime access to the Fibra app. Customers also earn an extra free pair for each friend who completes a qualifying purchase, and the friend gets 20% off.
Learn more at myfibra.com.
