Supplementation of dairy cows with propylene glycol during the periparturient period: effects on body condition score, milk yield, first estrus post-partum, Beta-hydroxybutyrate, non-esterified fatty acids and glucose concentrations

acide gras body condition ciclo estral complément alimentaire condición corporal cycle oestral dairy cows fatty acids glicose lactación lactation milk production oestrous cycle parto parturition producción lechera production laitière suplemento alimentar suplementos supplements vaca leiteira vacas lecheras vache laitière ácidos grasos état corporel