Grandparent, Sibling & Avuncular DNA Testing Miami | Prove Paternity

Grandparent, Sibling & Avuncular DNA Testing

Prove paternity without the father. Reconstruct biological family ties using grandparents, siblings, aunts, or uncles.

🏛️ AABB Accredited Laboratory

⚖️ Court & Estate Admissible

🧬 Advanced Matrix Processing

Who is being tested with the child?

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Grandparent(s)

Testing the alleged father's parents against the child.

👨👩‍🦰

Aunt, Uncle, or Sibling

Testing the alleged father's full sibling or known child.

Select Testing Category

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Legal Court-Admissible

Starting at $499

Notarized for estates, Social Security, and custody.

🏠

Peace of Mind

Starting at $399

Strictly private for personal knowledge only.

Select Collection Method

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Standard Clinic Visit

Visit Miami Beach or Wynwood.

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Private Mobile Concierge

Collector travels directly to you.

Review Your Selection

Order Summary

Relationship Type:

Test Category:

Collection Method:

Base Test Price:

Sales Tax (7%):

+$0.00

Card Surcharge (3.5%):

+$0.00

Results Delivery Timeframe: 3-5 Business Days

Total: $0

How Relationship Testing Works

When an alleged father is missing, deceased, or unwilling to participate, we can still establish a biological link to a child by testing his immediate blood relatives.

Because a child inherits exactly 50% of their DNA from their father, that father's genetic markers are shared with his own parents (the child's grandparents) and his full siblings (the child's aunts/uncles/siblings). By testing these relatives, our AABB-accredited laboratory can reconstruct the missing father's DNA profile and confirm paternity.

Note: We strongly recommend including the child's Mother in relationship testing. Her DNA helps the lab isolate which genes the child inherited from the maternal side, making the paternal search much more precise.

View Sample Lab Reports

Grandparentage Report

Twin (Zygosity) Report

Siblingship Report

Avuncular (Aunt/Uncle) Report

Choosing Your Testing Category

⚖️ Legal Court-Admissible

Requires strict Chain-of-Custody.
Government-issued ID required.
Collected by a neutral 3rd party.
Notarized AABB results.
Valid for Social Security, Estates, & Custody.

🏠 Peace of Mind

No ID required (Anonymous).
Does not follow Chain-of-Custody.
Results are scientifically identical.
Cannot be used in court or for legal claims.
Strictly for personal knowledge.

Relationship Testing FAQs

Can I establish paternity if only one grandparent is available to test?

Yes, but testing the child's mother is highly recommended. While one grandparent shares 25% of their DNA with the grandchild, having the mother's DNA allows the lab to eliminate her genetic contribution, making the single grandparent's DNA much easier to match against the child's remaining paternal DNA.

How does a siblingship test work? Can it tell if we have the same father?

Yes. A siblingship test determines the statistical probability that two individuals share one parent (half-siblings) or both parents (full siblings). If you are trying to find out if you share the same father, we strongly encourage testing a known parent (like the mother) alongside both siblings to drastically strengthen the results.

What is a Twin (Zygosity) DNA test used for?

A Twin DNA test scientifically proves whether twins are identical (monozygotic) or fraternal (dizygotic). Identical twins share the exact same DNA profile, while fraternal twins share about 50%, just like standard siblings. This is often used for medical reasons (like organ transplants or disease risk assessments) or simply for personal curiosity.

Can an aunt or uncle test completely replace a paternity test?

An avuncular (aunt/uncle) test is an indirect way to determine paternity. Because a full sibling of the alleged father shares about 50% of their DNA with him, we can test them against the child. While standard paternity tests offer 99.9% certainty, avuncular tests provide a statistical likelihood of relationship. Including the child's mother in the swab significantly increases the accuracy of this likelihood.

Can I use an at-home kit for a grandparent or sibling test?

Yes, you can choose the "Peace of Mind" option for personal knowledge, which can be done with an at-home kit or in-clinic. However, if you need the results for inheritance claims, Social Security survivor benefits, or immigration, you MUST select the "Legal Court-Admissible" option, which requires an in-person clinic appointment with strict chain-of-custody protocols.

Certified Local Collection Centers

📍 Miami Beach Center
1680 Michigan Ave, Suite 700
Miami Beach, FL 33139
🕒 Hours: Mon-Fri 9:30 AM - 3:30 PM

📍 Wynwood Center
252 NW 29th Street
Miami, FL 33127
🕒 Hours: Mon-Fri 9:30 AM - 3:30 PM

👉 Start Your Test Now