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These studies provides the probability of a genetic relationship between two persons.

Full Siblingship Study - Testing which is ordered for clients wanting to determine if they have both parents in common (sharing the same mother and the same father).

o     Routine turnaround time for results is 6 working days from the receipt of all samples (with common Mother included in test).  The average turnaround time without a common Mother in the test is 14 working days.

o    Siblings must share a common parent for full siblingship testing.  A full siblingship test can be performed if two individuals (Sibling 1 and Sibling 2) know they share the same mother, but want to know if they share the same father (who is unavailable for testing).  A full siblingship can be performed even if the mother is not available for testing.  However, the mother's participation is always encouraged for more conclusive results. 

o    Conclusions are a "likelihood". Guaranteed results are not possible for this type of testing.

o    Results will show a Combined Siblingship Index, a statistical value showing the genetic odds in favor of the relationship.  This number represents the number of times that the tested individuals are more likely than not to be biologically related as siblings.

Half Siblingship Study - Testing ordered for clients who want to determine if they have one parent in common (share the same mother OR the same father).

o    Routine turnaround time for results is 14 working days from the receipt of all samples.
o    Conclusions are a "likelihood".  Guaranteed results are not possible for this type of testing.
o    Half Siblingship analysis can be performed on a maximum of two (2) alleged siblings at a time.
o    A half siblingship test is performed if two individuals (Sibling 1 and Sibling 2) know they have different mothers but want to know if they share the same father (who is unavailable for testing.  A half siblingship can also be performed even if one or both mothers are not available for testing.  However, a other's participation is always encouraged for more conclusive results.

o    Results will show a Combined Siblingship Index, a statistical value showing the genetic odds in favor of the relationship.  This number represents the number of times that the tested individuals are more likely than not to be biologically related as siblings.
Usually the results from these types of test (Siblingship) will not hold up in a court of law since the results are inconclusive.

In a case where half-sister #1 and half-sister #2 share the same mother, and half-sister #2 has a child who is suspected of possibly being the child of half-sister #1's father (making the child also a half-sister to #1) -- it would not be possible to perform a half-siblingship study.  This is due to the fact that there is already a known biological relationship existing between the child of half-sister #2 and half-sister #1.  The solution would be a standard paternity test whereby samples would be collected from the alleged father (father of half-sister #1) and the child of half-sister #2.

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