# Health-Aware Smart Toothbrushes FERN by forEVA Analyzes Saliva for Hormonal & Biometric Insights By Laura McQuarrie | Published 2026-06-24 | Tech Source: Trend Hunter, https://www.trendhunter.com/trends/fern-by-foreva References: [forevahealth](https://www.forevahealth.com/fernbyforeva) & [instagram](https://www.instagram.com/doctorerinnance/reel/DY4wo-oJ1-j/)  One of the biggest friction points in building any tracking habit is the manual effort and intention required, and FERN by forEVA is a first-of-its-kind [smart toothbrush](https://www.trendhunter.com/trends/oralb-io-series-8) for women that adds [hormonal and biometric analysis](https://www.trendhunter.com/trends/mira-hormone-monitor) into a familiar, twice-daily task. This innovation out of [Yale Ventures](https://www.trendhunter.com/trends/breast-augmentation) taps into the power of saliva to reveal insights about the female body, and it gets its name from the “ferning” pattern that can be observed under a microscope when salt levels in saliva crystallize through ovulation and hormonal changes. With FERN by forEVA, women stand to benefit from a better understanding of their base operating system, and where they are in their cycle, and what they need in the moment. For privacy and control, FERN by forEVA sets itself apart with a local device storage option and a voluntary, opt-in subscription plan for an encrypted app that allows data integration with other mobile health tech devices. ## Trend Insights (Trend Hunter) - Score: 8.6/10 - Popularity: 89% | Activity: 91% | Freshness: 78% - Audience gender: 10% men, 90% women - Primary generations: Millennial - Top markets: North America ## Categories [Trend Hunter](https://www.trendhunter.com/trends) > [Tech](https://www.trendhunter.com/tech) > [Gadgets](https://www.trendhunter.com/gadgets) ## Key Themes ### Why This Trend Is Growing - **Passive Biometric Tracking:** Embedding diagnostics into routine behaviors reduces adherence barriers and reframes everyday consumer devices as continuous health intelligence platforms. - **Saliva-based Femtech:** Noninvasive hormonal sensing creates a path for cycle, fertility, and wellness insights without clinic visits or manual testing rituals. - **Privacy-first Health Devices:** Local storage and opt-in encrypted ecosystems signal demand for personal data ownership as connected wellness products become more intimate. ### Industries Being Reshaped - **Oral Care:** Smart toothbrush makers are positioned to expand from hygiene tools into diagnostic gateways that connect daily brushing with personalized health insights. - **Women's Health:** Femtech platforms gain new relevance when hormonal monitoring becomes ambient, recurring, and integrated into ordinary household products. - **Digital Health:** Interoperable biometric data from consumer hardware broadens remote care models by adding richer, longitudinal signals from nonclinical settings. ## Related on Trend Hunter - [Next-Generation Rechargeable Toothbrushes](https://www.trendhunter.com/trends/philips-sonicare1.md) - [Real-Time Feedback Smart Toothbrushes](https://www.trendhunter.com/trends/xiaomi-toothbrush.md) - [Next-Gen Electric Toothbrushes](https://www.trendhunter.com/trends/nextgeneration-sonicare-technology.md) - [Blue Light Toothbrushes](https://www.trendhunter.com/trends/w60.md) - [Oral Health Awareness Initiatives](https://www.trendhunter.com/trends/oral-health-night.md) - [Parametric Desk Cups](https://www.trendhunter.com/trends/aya-sfera.md) - [Dual-Light Electric Toothbrushes](https://www.trendhunter.com/trends/lumenic.md) - [Colorful Dental Packaging System](https://www.trendhunter.com/trends/veralidad-studio.md) - [Performance Minimalist Toothbrushes](https://www.trendhunter.com/trends/ultra-lite-sonic-electric-toothbrush.md)