Hormonal secretion in ovariectomized heifers and cycling cows following the application of Oestrophan inj. Spofa [Czechoslovak preparation]

animal animal domestique animal laitier animal pour cuirs et peaux animales animales de carne animales lecheros animals artiodactyla artiodactyle bovidae bovide bovin bovine bovines cattle checoslovaquia ciclo estral cows cycle oestral czechoslovakia domestic animals europa europe fisiologia fonction physiologique ganado ganado bovino gonadectomia gonadectomie gonadectomy heifers hormonas hormonas sexuales hormone hormone sexuelle hormones livestock mammals meat animals novilla oestrous cycle organic compounds ovariectomia ovariectomie ovariectomy physiological functions physiologie physiology prostaglandinas prostaglandine prostaglandins reproduction rumiante ruminant ruminants sex hormones sterilisation sterilization surgical operations vaca vache vertebrados vertebrates vertebre