MAIL-IN SELF-COLLECTION KIT
Not for court useSibling DNA Test — Informational
We understand this is a sensitive situation. Every kit is handled with complete discretion and care.
When the alleged father is unavailable, deceased, or unwilling to test, a sibling DNA test can still provide answers. The informational sibling test is a flat-price mail-in kit — we ship self-collection materials to each person being tested, they provide a simple cheek swab at home, and mail the samples back. The lab compares DNA to determine whether they are full siblings (same mother and father), half siblings (one shared parent), or unrelated. Results are private and delivered to you only — not formatted for court use. If you need legally admissible results, see our Legal Sibling DNA Test.
- AABB-Accredited Laboratory
- Easy At-Home Self-Collection
- 100% Confidential — Results Shared With You Only
- No Doctor Referral Required
Trusted by individuals nationwide for private, confidential sibling answers.
Price
$379 — flat mail-in price
Results in 5–7 business daysFinal pricing is confirmed before you pay.
Best for: Personal knowledge when a parent is unavailable, deceased, or unwilling to test
Collection time: approximately 10–15 minutes — two simple cheek swabs at home.
$379 — flat mail-in price
How Does the Informational Sibling Test Work?
Step 1 — Kit ships to you
We mail a self-collection kit to each person being tested, with clear instructions.
Step 2 — Self-collect at home
Each person provides a simple cheek swab, taking less than a minute. No blood draw, no appointment required.
Step 3 — Mail your samples back
Use the prepaid shipping materials included in your kit to send both samples to the lab.
Step 4 — Results delivered privately
Results are typically ready in 5–7 business days after the lab receives both samples, delivered privately to you only.
What You Need to Know Before Ordering
- This test compares DNA markers between the two people tested to determine full sibling, half sibling, or unrelated status
- Including a shared parent's sample (if available) significantly increases accuracy, especially for distinguishing full vs. half siblings — optional, not required
- Results are for personal knowledge only and are not formatted for court use — see the Legal Sibling DNA Test if you need court-admissible results
- No doctor's referral required
Need court-admissible results? Our Legal Sibling DNA Teststarts at $499.
Frequently Asked Questions
Do we need a parent's DNA sample too?
No, but it helps. Testing two siblings alone can determine a relationship, but including a shared parent's sample (when available) increases accuracy and helps distinguish full siblings from half siblings more precisely.
What's the difference between full and half siblings in these results?
Full siblings share both biological parents; half siblings share only one. The test analyzes shared DNA markers between the two people tested to determine which is more likely, or whether no biological relationship exists.
How accurate is a sibling DNA test?
Sibling testing is generally less definitive than a direct parent-child test, since siblings share DNA more variably. Accuracy improves significantly when a shared parent's sample is included. Your results will include a clear probability statement explaining the confidence level.
Can this be used if the alleged father is deceased or unavailable?
Yes — this is one of the most common reasons people choose sibling testing: comparing two people directly when a parent isn't available to test.
Is this test confidential?
Completely. Results are delivered only to you, never shared with third parties.
What's the difference between informational and legal sibling testing?
Informational testing is mail-in and private, for personal knowledge only. Legal testing requires supervised, chain-of-custody collection and produces court-admissible results. See the Legal Sibling DNA Test page if you need results for a legal proceeding.