|  | Female group |
---|
 |  | Farm 1 | Farm 2 | Farm 3 | Juvenile | Embryo |
---|
Male group | Farm 1 | 1 | 0 | 0 | 1 | 0 |
 | Farm 2 | 0 | 1 | 0 | 1 | 0 |
 | Farm 3 | 0 | 0 | 1 | 1 | 0 |
 | Juvenile | 1 | 1 | 1 | 1 | 1 |
 | Embryo | 0 | 0 | 0 | 1 | 1 |
 | AI | 1 | 1 | 1 | 1 | 0 |
- Farm denotes the farm of birth, embryos are animals already conceived in the current year, juveniles are animals conceived in the previous year; bulls that can be used for artificial insemination (AI) are defined as having already been used for one or more mating cycles; a '1' denotes that matings can be made between the groups concerned; in this case, no migration between farms is permitted for natural mating purposes; matings involving embryos or juveniles are virtual matings and not part of the active mating set.