Physiological traits in preterm calves during their first week of life

Journal of Animal Physiology and Animal Nutrition
S BittrichJ W Blum

Abstract

Morbidity and mortality of preterm neonatal calves are higher than of calves born at normal term, possibly and in part due to immaturity of physiological functions. Physiological parameters were therefore studied during the first week of life in seven preterm calves, born on day 277 of gestation after dams were injected prostaglandin F2alpha and flumethason. Calves were fed colostrum of the first milking for the first 3 days and from day 4 to day 7 the same colostrum diluted with milk replacer. Body weight increased during the first week of life by 2.2 kg. Heart rate and respiratory rate were always relatively high, whereas values of rectal temperature, blood gases, haematological, metabolic and endocrine traits were in the range and behaved similarly as is the experience in full-term neonatal calves. Major exceptions were glucose and insulin, the concentrations of which barely rose postprandially, and growth hormone, the responses of which to growth hormone releasing factor analogue 1-29 were extremely variable and in part very small. In conclusion, calves born 2 week before normal term that survived the first week of life, although physiologically immature, were well able to handle ingested nutrients and to control their meta...Continue Reading

Citations

Jan 21, 2006·Journal of Animal Physiology and Animal Nutrition·J W Blum
Sep 29, 2011·Journal of Dairy Science·J Steinhoff-WagnerH M Hammon
Mar 19, 2008·Extremophiles : Life Under Extreme Conditions·Cecilia DemergassoCarlos Pedrós-Alió
Jun 28, 2019·Ecological Applications : a Publication of the Ecological Society of America·S E MacDonaldJ H Sperry

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