[The ecography in the management of mares in big breeding]

animal breeding cavalle ciclo estral ciclo estrale controllo della riproduzione corpo luteo corps jaune corpus luteum cycle oestral diagnosi diagnosis diagnostic echographie echography ecografia follicoli ovarici follicule ovarien gestation gravidanza jument mares mejoramiento animal oestrous cycle ovarian follicles pregnancy reproduction control servicios veterinarios servizi veterinari veterinary services yegua