RESUMEN

Injectable vitamin A was given to six pregnant beef cows in their last third of pregnancy to study the effect of this vitamin in their calves. Average birth weight and growth rate of calves from the treated cows were higher than that of calves from the nontreated cows. Prepartum vitamin A injections also resulted in a significant increase (P less than 0.05) in the mean corpuscular volume (MCV), total serum protein and globulin fraction of serum protein in calves of treated cows.

Asunto(s)

Animales Recién Nacidos/crecimiento & desarrollo , Proteínas Sanguíneas/metabolismo , Bovinos/fisiología , Índices de Eritrocitos/veterinaria , Intercambio Materno-Fetal , Vitamina A/farmacología , Animales , Animales Recién Nacidos/sangre , Peso al Nacer/efectos de los fármacos , Peso Corporal/efectos de los fármacos , Bovinos/embriología , Índices de Eritrocitos/efectos de los fármacos , Femenino , Embarazo , Seroglobulinas/metabolismo