The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Tact is a design concept, not a product you can buy. It is an edible, lollipop-shaped pregnancy test meant to let blind and low-vision people read a result by feel instead of sight. The idea is that a gelatin surface would raise bumps on the tongue when it detects the pregnancy hormone hCG in saliva. According to a Smithsonian Magazine feature published October 6, 2026, the device has not been clinically tested, and regulatory work is still ahead.
How Tact is meant to work
Design master’s student Sneha Rao developed the concept with advice from Wayne Chung, a biomedical engineering expert at Carnegie Mellon. The user would place a flat lollipop in the mouth. A gelatin matrix combined with an hCG-binding DNA aptamer would react to hCG in saliva, and the surface would swell into raised bumps the tongue can feel.
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The proposed result language
| What the tongue feels | Intended meaning |
|---|---|
| Both sides swell | Positive |
| One side swells | Negative |
| No swelling | Invalid test |
These are intended design behaviors, not measured test performance.
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Rao looked at edible sublingual films and hollow shapes before settling on a flat lollipop. Her work so far includes 3D-printed texture tests and gelatin prototypes. When the feature ran, she was still working on combining the gelatin matrix with the aptamer. That combination is the part that would make the device a working test rather than a texture demonstration.
#1 Best Overall
- RESULTS IN 3 MINUTES: With this 3-count box of First Response Early Result Pregnancy Tests, get accurate results in 3 minutes, sooner than any other early detection test (2); 6 days before the day of your missed period
- NO EARLY DETECTION PREGNANCY TEST TELLS YOU FASTER (2): With reliable results in 3 minutes, no early detection pregnancy test gives you results sooner than First Response Early Result Pregnancy Tests
- OVER 99% ACCURATE: Early Result early pregnancy test is over 99% accurate at detecting pregnancy hormone levels on the day of your expected period (3) so you can have confidence in the results
- CONVENIENT & PORTABLE: Each disposable test is discreetly sized and individually wrapped so you can test anytime and anywhere
- SIMPLE TO USE AND READ: Place test tip in urine stream for 5 seconds and wait 3 minutes for results; after 3 minutes, this pregnancy test shows 2 pink lines for a pregnant result and 1 pink line to indicate a not pregnant result
Why a tactile test matters
Accessibility problems with home pregnancy tests go beyond the final line. Users may need to read a result line or color change, check an expiration date, follow printed instructions and handle the test itself. Stephanie Enyart, chief public policy and research officer at the American Foundation for the Blind, put it this way in the Smithsonian piece: “Pregnancy tests are inaccessible both because they must be read visually and because the packaging and instructions are often inaccessible.”
Faint lines can be hard to interpret even for some people with usable vision. Depending on another person, or sending a photo to someone for interpretation, means sharing a sensitive result. Joanne Hewitson, quoted in the feature, described her concern as “never being able to take a pregnancy test alone.” Eleanor Southwood, then chair of the Royal National Institute of Blind People, said in a 2020 Wall Street Journal article cited by Smithsonian: “The dream is to buy any pregnancy test with the knowledge that it’s accessible.”
Rank #2
- RAPID DETECTION PREGNANCY TEST: Includes two (w) Clearblue Rapid Detection Home Pregnancy Tests that can give you a result as fast as 1 minute[1]
- EASY TO USE: The extra-wide tip changes color to show you’ve hit the target. The comfortable-to-hold, long, curved handle for easy sampling also helps maintain hygiene
- EASY-TO-READ RESULTS: Clear plus (+) or minus (-) result
- OVER 99% ACCURATE: Over 99% accurate at detecting pregnancy from the day you expect your period[2]
- FLOODGUARD(TM) TECHNOLOGY: Helps cut down on #1 reported usage error by +70%[3]
The feature also says the U.S. Census Bureau’s American Community Survey found nearly nine million U.S. residents with some kind of vision disability, including 4.8 million women and girls, or 54 percent of people with vision impairment. The article does not give the survey year here, so treat the figures as a rough indication of scale.
Tact versus the options available now
| Factor | Conventional home test | Tact (concept) |
|---|---|---|
| Availability | Widely sold | Not for sale; prototype stage |
| Result access | Usually visual (lines or color) | Intended to be tactile |
| Packaging, instructions, expiry | Often inaccessible, per Enyart | Not addressed in the reporting |
| Privacy | Compromised if a person or photo-sharing service reads the result | Intended to allow solo reading |
| Accuracy evidence | Established for tests on the market | None established for Tact |
| Timing | Depends on the test and circumstances | Not established |
Phone-based visual assistance is an existing workaround. It trades away privacy, because image sharing or human help is involved, and it is not a validated accessible test. The RNIB previously publicized a tactile urine-stick prototype, but Enyart told Smithsonian she was not aware of it reaching the market. That is one expert’s knowledge, not a full survey of accessible products.
Rank #3
- EARLY DETECTION PREGNANCY TEST: Includes three (3) Clearblue Early Detection Pregnancy Tests
- EASY-TO-READ RESULTS: Two lines means you are pregnant. It does not matter how faint or dark (or how wide) the lines are
- OVER 99% ACCURATE: The Clearblue Early Detection Pregnancy Test is over 99% accurate from the day you expect your period[1]
- RESULTS 6 DAYS SOONER: Can tell you 6 days sooner than your missed period (5 days before you expect your period)[2]
- DETECTS hCG HORMONE: Can detect even low levels of the “pregnancy hormone” (hCG) in your urine[3]
What is unproven
The 96 percent claim
Rao said saliva hCG research could provide “a 96 percent accurate result.” The feature does not identify the study, the population or the test behind that figure, and it is not a measured accuracy for Tact.
Saliva versus urine
Enyart raised open questions about timing and consistent reliability for saliva testing compared with urine. She also offered a general comparison: blood tests can give a result 7 to 10 days after conception, and urine tests 12 to 14 days. The article gives no clinical source for these ranges, so don’t treat them as fixed timelines for any particular test.
Rank #4
- Portable and discreet, test anywhere, anytime
Missing steps
Rao’s next steps are clinical testing and regulatory groundwork. Her stated goal is to license the design or partner with a diagnostics manufacturer, not to launch it herself. No release date has been announced. Even if Tact works, the intended user would still need to confirm a result with a doctor or other health-care provider.
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Tact can’t be used now, so anyone who needs a pregnancy test has to rely on existing options. A health-care provider or pharmacist can advise on testing and confirmation. They can also tell you which approach best protects your privacy, and whether a trusted person or a visual-assistance service is worth the trade-off. The reporting doesn’t identify any specific commercial test as fully accessible, so this article doesn’t recommend one.
Quick Recap
Best Value
- EARLY DETECTION PREGNANCY TEST: Includes five (5) Clearblue Early Detection Pregnancy Tests
- EASY-TO-READ RESULTS: Two lines means you are pregnant. It does not matter how faint or dark (or how wide) the lines are
- OVER 99% ACCURATE: The Clearblue Early Detection Pregnancy Test is over 99% accurate from the day you expect your period[1]
- RESULTS 6 DAYS SOONER: Can tell you 6 days sooner than your missed period (5 days before you expect your period)[2]
- DETECTS hCG HORMONE: Can detect even low levels of the “pregnancy hormone” (hCG) in your urine[3]
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