The Periparturient Cow — A Pivotal Entity in Dairy Production

摘要: Abstract The periparturient period describes the time of parturition and those events within a few weeks prior to following parturition. Considerable new knowledge has been generated during past 25 yr concerning cow. Generation physiologic endocrinologic information voluminous rewarding. Nutritional requirements cow are better understood as sanitation requirements. Management environmental conditions change constantly, problems develop rapidly old solved. Fruitful areas further research discussed for prepartum cow, parturient postpartum Also is opportunity merge good biological information, reported over from laboratories, with field investigations applied usage. Research concerned "genetic engineering" immunogenetics considerable importance dairy industry. Discussed use such findings improve disease resistance, onset cyclic activity, associated