| TestCountry | Blood test kit suitable for testing 2 individuals, more siblings may be added as needed. Parents can be added also | Blood | Yes |
| TestCountry | Cheek swab test kit suitable for testing 2 individuals, more siblings may be added as needed. Parents can be added also | Cheek Swab | Yes |
| AllTests | Cheek swab twin zygosity test | Cheek Swab | Yes |
| GeneSys Biotech | Buccal swab twin zygosity test | Buccal Swab | Yes |
| Beta Paternity Laboratory | With a buccal swab you can compare the twins? DNA profiles. Identical twins will have exactly the same profile | Buccal Swab | Yes |