Dr Esteban Balla, DVM, from SIBRA (Servicio Integral de Biotecnologías en Reproducción Animal) presented a veterinarian’s view of bull fertility testing in Argentina.  Most of Argentina’s cattle are farmed for beef, so conception rates are intimately linked with revenue generation.  Esteban emphasised the need for bull soundness to be tested regularly and he uses Dynescan to assess fresh semen quality at the farm.  Removing non-productive bulls is very important to improve revenue and sustainability. The value of evaluating semen quality as a function of time was also highlighted, with case studies indicating that semen that initially appeared to be of high quality can lose motility within minutes revealing a new and convenient way to identify poor reproductive performance during bull fertility testing.