Artificial Insemination Equipments sire’s full registered name, country of registration and registration number, National Association of Animal Breeders (NAAB) stud code and collection code number printed on them. semen collection or processing centre code breed identification of the bull (ID or HB number, name) collection code: date where the semen batch was collected SEMEN TRANSFER At the time of purchase, a cane of semen is transferred to the herd’s liquid nitrogen tank. Tanks should be placed side by side so transfer can take place within a few seconds. Straws should remain immersed in a goblet with liquid nitrogen and not transferred individually without protection.