Dietary energy source at two feeding levels during lactation of primiparous sows. I. Effects on glucose, insulin, and luteinizing hormone and on follicle development, weaning-to-estrus interval, and ovulation rate

alimentation amidon blood cerdas cerdo ciclo estral cycle oestral destete effects energy sources feeding gestation inhibition insulin insulina insuline lactation lh nutrition oestrous cycle ovulation performance de reproduction porcin pregnancy reproduction reproductive performance reproductividad sang sangre sevrage sows starch swine truie weaning