3billion offers test options according to the method of sequencing.

Proband/Duo/Trio tests (whole exome sequencing)

• Proband: affected patient
• Duo: affected patient and one biological parent
• Trio: affected patient and both biological parents

Variant Specific Test (Sanger sequencing): for proband’s parents and/or other family members once variant is reported in the proband’s 3billion whole exome sequencing test to test if the same variant is also present

Duo and Trio testing are intended for the proband and their biological parents, thus if the proband has any siblings or relatives with similar symptoms, please place separate Proband test orders for each individual and indicate that they have relatives already tested at 3billion.