About This At-Home Twin Zygosity DNA Test Kit
The My Forever DNA® Twin Zygosity DNA Test helps determine whether twins are identical or fraternal with simple, private at-home collection. Get answers for newborns, children, teens, or adults with no doctor visit, online portal, barcode activation, or complicated registration.
- Determines whether twins are identical or fraternal
- 99.999%+ Accurate, tested in a premier U.S. AABB-accredited and CAP-certified laboratory
- 24 DNA Genetic Markers tested for twin zygosity analysis
- Suitable for twins of any age, including newborns, children, teens, and adults
- Simple, pain-free cheek swab collection from home
- Discreet DNA sample options available when cheek swabs are not possible
- All Lab Fees Included with no surprise processing fees after purchase
- Fast 1-3 business day results after your DNA samples and completed Result Notification Form are received by the lab and placed into processing
- Secure PDF results delivered by email
- Real human support from My Forever DNA® from start to finish
What Is a Twin Zygosity DNA Test?
A twin zygosity DNA test compares the DNA profiles of twins to determine whether they share the same genetic profile. Matching profiles support that the twins are identical twins; non-matching profiles support that they are fraternal twins.
Families choose zygosity testing for personal knowledge, family history, medical background awareness, or peace of mind. Appearance alone cannot always confirm twin type.
Simple, Private DNA Collection From Home
Collection is quick, easy, and non-invasive. Each kit includes cheek swabs and instructions. No needles, blood draws, doctor visits, or complicated registration required.
Choose the Twin Zygosity Testing Option That Fits Your Family
Standard Single-Location Twin Zygosity Test
If both twins can collect samples from the same home, our Standard Twin Zygosity DNA Test Kit is the best option.
Multiple Location Twin Zygosity Test
If twins live in different homes, cities, or states, our Multiple Location Twin Zygosity DNA Test Kit allows two kits to ship to separate addresses.
Discreet or Alternative DNA Sample Options
If cheek swabs are not possible, My Forever DNA® offers Discreet DNA Testing using approved alternative samples, such as toothbrushes, hair with root, nail clippings, or earwax.
Premier Accreditations & Gold Standard Accuracy
Every sample is processed by a trusted U.S.-based laboratory with AABB accreditation and CAP certification. Each test includes 24 DNA genetic markers plus Amelogenin gender identification for clear, reliable results.
Learn more on our About Our Laboratory page.
Why Choose My Forever DNA®?
Since 2015, My Forever DNA® has made at-home DNA testing simple, private, and supported. No portals, activation codes, or impersonal systems—just real guidance from order to results.
- No online portal required
- No barcode activation or kit registration
- No confusing automated process
- Secure PDF results delivered by email
- Discreet testing options available
- Real support from real people
Get Clear Answers About Your Twins
Whether testing newborn twins, adult twins, or twins in different locations, this kit gives families a simple, reliable way to learn whether twins are identical or fraternal with trusted lab standards and human support.
Clarity, Care & Transparency
For informational use only. This product is not a medical device and is not intended to diagnose, treat, prevent, or assess any medical condition.
This test is not intended for legal or court-admissible purposes unless a legal chain-of-custody test is purchased. Learn more about Legal DNA Testing options.
Learn more about privacy, responsible advertising, and customer trust in our Trust & Transparency Statement.
