Reproductive performance of gilts mated at first heat [experimented on Landrace, Large White and Duroc]

animal animal domestique animal pour cuirs et peaux animales animales de carne animals artiodactyla artiodactyle biological properties cerdo ciclo estral cycle oestral domestic animals fisiologia fonction physiologique ganado livestock mammals meat animals oestrous cycle performance de reproduction physiological functions physiologie physiology porcin reproduction reproductividad reproductivity swine vertebrados vertebrates vertebre