Reproductive ultrasound in dairy practice

attitudine alla riproduzione ciclo estral ciclo estrale cycle oestral dairy cows diagnosi del sesso echographie echography ecografia fertilidad fertilite fertility follicoli ovarici follicule ovarien gestation gravidanza hormonas hormone hormones monitoraggio monitoring oestrous cycle ormoni ovarian follicles performance de reproduction pregnancy reproductive performance reproductividad sex diagnosis sexage surveillance vacas lecheras vacche lattifere vigilancia