Vet checking cattle for pregnancy prior to artificial insemination on a ranch, Finca La Paz, Turbana, near Cartagena, Colombia. Also injecting vitamins to prepare non-pregnant cattle for the insemination, and taking blood samples. Vet: Guillermo Solorasan, from Medellin, working with Cesar Villa taking notes and Jorge Londoño giving injections. 127 cattle examined.