X-SV Maternal Lineage Testing
The X-SV maternal lineage test is used to determine whether two or more people are related through their maternal lineage, or if male and/or female children have the same biological mother. The Mitochondrial DNA sequence variation is passed from females to their children and has a relatively infrequent mutation rate, thus it remains the same through many generations. (Males do not pass the X-SV they inherited from their mother to their children).
This test focuses on the Mitochondrial DNA and results in a unique X-SV profile for each individual tested. It is important to note that this test will not differentiate women that are in the same maternal lineage or children with the same mother.
For example, if a female Child "A" and her alleged half brother Child "B" (Child "B" having a different father than Child "A") want to know if they have the same maternal biological grandmother, and they have the same X-SV profile, it is very likely that they are of the same maternal lineage. If the X-SV profiles do not match, then they neither share the same maternal biological grandmother, nor do they share the same maternal lineage.
This is just one of many circumstances in which the X-SV test can be applied. Review the chart to the right as a guide. The standard turn-around time for this service is 14 business days (faster times are available, see the RUSH options below). Give us a call toll free at 1.866.833.6895 and speak with one of our very knowledgeable case workers for more information.
Step 1: Review shipping information
Please review the following important information:
All orders are shipped in plain, confidential packaging. There is nothing on our return address or packages to indicate the nature of the product inside!
For shipping in the continental U.S.
- All orders include a pre-paid addressed return mailer OVERNIGHT FedEx for NO EXTRA CHARGE
- You may choose how you want your kit sent to you. US Mail will take approximately 7-10 Days. For faster delivery of your kit, you may choose Priority Mail or overnight FedEx options (FedEx requires a street address and telephone number)
For shipping outside of the continental U.S: Orders to Canada, Mexico, Hawaii, Alaska, Puerto Rico and recognized US territories can be shipped by mail or FedEx but may not contain a prepaid FedEx return package, depending on location. For INTERNATIONAL orders please call or e-mail for shipping and handling charges.
When orders are shipped: Orders received* Monday through Thursday by 12 noon Mountain Time will be shipped that day; if you choose FedEx overnight you will receive the kit the following day. Orders placed on Fridays for FedEx shipment can be slotted for Saturday delivery (if service is available in your area), otherwise you will receive your shipment the following Monday. GTL does not ship or receive on weekends and most federal holidays.
* Although you may place your order before noon, GTL may not receive the order notification for several hours.
Step 2: Select a DNA test
Please Note: All orders include a pre-paid addressed return overnight FedEx mailer.
Click here for instructions to test parties in multiple locations.
Rush Analysis Options
- 5 Day Release: $1000
By close of business on 5th business day following receipt of samples
- 10 Day Release: $500
By close of business on 10th business day following receipt of samples
Review additional information
Information concerning how samples are taken, the difference between legal and informational testing, buccal versus "pin-prick" sample collection, and more is available and should be reviewed.
Our Refund Policy
Samples must be submitted within 3 months of case initiation or the case will be closed. Refunds will be issued only if applied for within 15 days of the order date. Refunds for orders involving test kits only will not be issued. Full details on our refund policy can be found here.
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