Collecting DNA Samples for Infidelity DNA Testing
How to Collect DNA Samples for Infidelity Testing
Proper sample collection is an important part of infidelity DNA testing. Whether you're submitting underwear, bedding, clothing, or another personal item, careful handling and packaging can help preserve biological material and reduce the risk of contamination.
Unlike standard DNA tests that use cheek swabs, infidelity DNA testing often involves non-standard samples that may contain semen, saliva, or human DNA.
At DNA Test Answers, we accept a variety of non-standard samples for laboratory analysis. Follow these guidelines to prepare your items for testing.
What Samples Can Be Used for Infidelity DNA Testing?
Many everyday items may contain biological material suitable for testing, including:
Underwear and clothing: Suspected stains or areas of bodily contact.
Bedsheets and pillowcases: Areas that may contain semen, saliva, or other biological material.
Towels and tissues: Items that may contain bodily fluids or skin cells.
Toothbrushes and personal items: Potential sources of DNA from a regular user.
Hair with attached roots: May provide DNA suitable for profiling.
The presence of biological material is not guaranteed, and some items may contain DNA from multiple individuals.
How to Collect and Prepare Your Samples
1. Minimize Handling
Avoid touching suspected stains directly. Use clean disposable gloves when possible and change gloves between samples to help prevent cross-contamination.
2. Identify the Testing Area
If an item has a visible stain or specific area of concern, identify that location for the laboratory.
For example, you might indicate a stain on the interior of underwear or a particular section of a bedsheet.
Photographs can help document the location. Avoid touching or marking directly on the suspected stain.
3. Allow Damp Items to Air-Dry
If clothing or fabric is damp, allow it to air-dry completely at room temperature before packaging.
Do not use hair dryers, heaters, or direct sunlight. Moisture and excessive heat can damage biological material.
For unusual wet or liquid-containing samples, contact us for instructions before shipping.
4. Package Samples Separately
Place each completely dry item in its own clean paper envelope or bag.
Avoid sealing damp items in plastic, which can trap moisture and promote bacterial growth.
5. Label and Store Your Samples
Label each package with your order number, a description of the item, and the specific area you want tested.
Keep samples in a cool, dry location until shipping.
Should You Cut Out a Stain Before Shipping?
We generally recommend submitting the entire garment when practical. This allows the laboratory to examine the suspected stain and surrounding fabric.
If an item is too large to ship, such as a bedsheet or mattress cover, contact DNA Test Answers before cutting out a section.
Can Washed or Older Samples Still Be Tested?
Yes. Biological material may remain detectable on washed clothing or items stored for extended periods.
However, washing, heat, moisture, sunlight, and repeated handling can reduce the likelihood of successful detection or DNA recovery.
Do not wash or clean an item before submitting it for testing.
Packaging and Shipping Your Samples
Once your items are completely dry and individually packaged, place them in a sturdy outer shipping envelope or box.
Include your order number and use a shipping service that provides tracking.
Avoid excessive heat or moisture during storage and shipment. Special items, including used condoms or liquid-containing samples, may require additional packaging instructions.
Frequently Asked Questions
Can I send an entire pair of underwear?
Yes. You can submit the entire garment. Identify any specific stain or area you want examined.
Can I submit multiple items?
Yes. Package and label each item separately. Additional items may require additional testing fees.
What if I accidentally touched the sample?
The item may still be suitable for testing. Avoid further handling, as additional contact can introduce DNA.
Do I need to collect a stain with a cotton swab?
Not necessarily. If the stain is on a removable item, submitting the item itself is often preferable.
Ready to Submit Your Samples?
Proper collection and packaging help give your samples the best opportunity for successful laboratory analysis.
DNA Test Answers offers specialized infidelity DNA testing services, including semen detection and DNA profile comparison.
If you're unsure whether an item is suitable or how to prepare it, contact DNA Test Answers before shipping.
Before You Order
This is a laboratory testing service that compares a recovered DNA profile to a known reference sample.
A DNA profile can only be compared if sufficient human DNA is successfully recovered from the submitted item.
One complimentary oral swab collection kit for your reference sample is included with every standard order. Collection options can be customized during checkout.
For added discretion or faster processing, you may select "Electronic Instructions" during checkout and submit your own approved reference sample directly to our laboratory.