Bone mineral changes in growing, pregnant and lactating cattle |
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| Authors: | R Zetterholm |
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| Institution: | 12.Department of Animal Hygiene and the Department of Clinical Radiology, Animal Science Centre, College of Veterinary Medicine, Swedish University of Agricultural Sciences, S-750 07 Uppsala 7, Sweden ;22.Laboratory for Comparative Orthopaedics, Hospital for Special Surgery, USA ;32.New York Hospital — Cornell University Medical College, New York, USA |
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| Abstract: | Bone mineral content (BMC) was determined in one or two coccygeal vertebrae by dichromatic photon absorptiometry in two sets of cattle: A. This set consisted of six fattening bulls. Their increases of BMC and weights were closely correlated. However, BMC increased slightly more than weight. B. There were 28 cows in this set. BMC was measured during lactation and pregnancy. It was found that BMC increased during the dry period and decreased during early lactation. There were great individual variations in BMC, and the skeletal turnover seemed to be great. |
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| Keywords: | absorptiometry bone mineral measurement calcium metabolism cattle gamma ray source phosphorus |
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