Family curiosity
Answer a question families may have carried for years.
DNA Testing
Twin Zygosity DNA Testing
Find out whether twins are identical or fraternal through a simple DNA comparison.
Informational $299 · Legal $399 · Confidential
Testing options
Choose your test
Twin Zygosity
Who is tested: Both twins provide cheek swabs. A parent or guardian attends when the twins are minors.
Standard results: 3 to 5 business days. Expedited results (+$100): 1 to 2 business days. These times are for regular DNA tests, not Immigration DNA. Choose expedited in your cart.
Understanding your options
What twin zygosity dna testing is
Twin zygosity testing compares the twins' DNA to determine whether they are identical or fraternal.
Collection is simple, private, and suitable for children or adults.
Reasons for testing
Why people choose this test
Medical history
Clarify zygosity when it may help family health conversations.
Record keeping
Keep a documented answer for future reference.
Simple collection
Complete painless cheek swabs at a scheduled appointment.
Participants and samples
Who needs to be tested
Both twins provide cheek swabs.
A parent or guardian attends when the twins are minors.
What to expect
How it works
- 1
Reach out
Tell us what you hope to learn and whether the results are for personal or official use.
- 2
Schedule collection
We confirm the right test, participants, documents, and a convenient appointment time.
- 3
Collection appointment
Samples are collected carefully and identities are documented when chain of custody is required.
- 4
Laboratory analysis
The collected samples are securely prepared for DNA analysis.
- 5
Confidential results
Results are delivered privately, and our team can answer process-related questions.
Appointment preparation
What to bring
Do not eat, drink, smoke, or chew gum 1 hour before your appointment.
For a legal case, each adult should bring a valid government-issued photo ID.
Bring the child's birth certificate or identification when applicable, with a parent or legal guardian present for minors.
Informational testing generally requires less documentation than legal chain-of-custody testing.
Bring any court, agency, or case paperwork connected with the request.
We'll confirm exactly what you need when we schedule.
FAQ
Common questions about twin zygosity
It is DNA testing designed to help answer a specific twin zygosity dna testing question through comparison of the appropriate participants or samples.
Both twins are tested using cheek swabs.
Most standard collections use a painless cheek swab.
Many cases offer both. Legal or court-admissible testing requires identity verification and documented chain of custody.
Standard results: 3 to 5 business days. Expedited results (+$100): 1 to 2 business days. These times are for regular DNA tests, not Immigration DNA. Timing starts once all required samples and information are received.
Yes. Case information and results are handled privately and shared with authorized recipients.