At-Home Sibling DNA Test | DIY Digital Instructions
DIY sibling DNA test using cheek swabs, with instructions and forms emailed right after purchase and no kit shipped.
Start your sibling DNA test today without waiting for a physical kit. The My Forever DNA® DIY “Make Your Own” Sibling DNA Test helps determine whether tested individuals are most consistent with being full siblings, half siblings, or not biologically related as siblings.
Use cheek swabs, qualifying discreet DNA samples, or a mix of sample types. Instructions and required forms are delivered electronically after purchase.
Explore our Sibling DNA Testing options or Secret DNA Testing Collection.
Full siblings share both biological parents; half siblings share one. A sibling DNA test compares genetic markers and evaluates how strongly the evidence supports the relationship possibilities relevant to your family. A half-sibling result does not, by itself, identify which biological parent is shared. Some comparisons are inconclusive because the available DNA evidence does not clearly distinguish the possible relationships. For examples of how known parents affect the interpretation, read our sibling DNA testing and results guide.
If the goal is to determine whether siblings may share the same biological father, maternal DNA is strongly recommended when available. It helps the laboratory account for known maternal genetic contributions and better evaluate evidence associated with a possible shared father.
A known mother's sample can also help when the potential siblings have different biological mothers. When applicable, one known mother's cheek-swab reference sample is included at no additional cost. Tell your DNA Specialist which participants share a known mother and discuss the sample plan before adding another mother or relative. The maternal reference supports the sibling comparison; it does not add a separate maternity determination.
A sibling DNA test without the parents can help when one or both biological parents are deceased, unavailable, unreachable, or unwilling to participate.
If a biological parent is available, a direct paternity DNA test or maternity DNA test is generally the most direct option.
Testing analyzes 46 DNA genetic markers plus Amelogenin through our U.S.-based AABB-accredited and CAP-certified laboratory partner. Statistical analysis evaluates how strongly the DNA evidence supports the tested sibling relationship.
Some cases may benefit from another known biological relative, such as a grandparent or aunt or uncle. Ask your DNA Specialist which relative could help before purchasing an additional test or sending extra samples.
Cheek-swab sibling testing typically takes 2-3 business days; cases using approved alternative samples typically take 5-7 business days. Both timelines begin after all required samples and completed forms are received and accepted by the laboratory. Allow additional time for collection and shipping.
Receive clear instructions, sample-received confirmation, turnaround guidance, and secure PDF results by email. For assistance, contact a My Forever DNA® DNA Specialist.
| Collection format | Choose it when |
|---|---|
| DIY sibling test on this page | You want emailed instructions and will provide the collection supplies and arrange return shipping. No physical kit is sent. |
| Standard sibling DNA kit | You want collection materials shipped to one address. |
| Multi-location sibling DNA kit | You want separate collection kits shipped to participants at different addresses under one case. |
For a preview of the supplies and collection process before ordering, read our DIY digital DNA collection guide. The instructions and forms specific to your purchase arrive by email after ordering.
This test is for informational and personal knowledge only and is not legally admissible. For court, custody, immigration, inheritance, or other legal purposes, contact us about in-office legal DNA testing in Omaha before collecting samples so the required chain-of-custody process can be arranged.
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