Initiation of Parturition in Dairy Cows with Dexamethasone. II. Response to Dexamethasone in Combination with Estradiol Benzoate
Open Access
- 1 February 1976
- journal article
- Published by American Dairy Science Association in Journal of Dairy Science
- Vol. 59 (2), 241-247
- https://doi.org/10.3168/jds.s0022-0302(76)84190-2
Abstract
Parturition was initiated in 26 Holstein cows given dexamethasone (4.4 mg/100 kg body weight) in combination with 25 mg estradiol benzoate intramuscularly at day 273 of gestation. Parturition occurred at 40.8 +/- 9.6 h after injection. Twenty-six control cows had an average gestation length of 281.5 days. Calving difficulty was not different although birth weight of calves was 2.5 kg less for induced cows compared with control cows. Severity of udder edema did not differ between groups. Average daily milk production for the first 9 wk of lactation was lower (24.2 versus 27.7 kg) from induced than control groups. Incidence of retained placental membranes was 50 and 4% for induced and control cows. Serum estrogens were lower (290 versus 601 pg/ml) in induced than in control cows 2 days prior to parturition. Groups did not differ inserum calcium, phosphorus, magnesium, days to first heat, days to first breeding, days to conception, or in fat, protein, and total solids content of colostrum. Casein in colostrum of induced cows was lower. Results of California Mastitis Tests at 15 and 30 days postpartum were similar.Keywords
This publication has 14 references indexed in Scilit:
- Initiation of Parturition in Dairy Cows with Dexamethasone. I. Cow Response and PerformanceJournal of Dairy Science, 1974
- Use of Estrogen with Dexamethasone for Inducing Parturition in Beef Cattle2Journal of Animal Science, 1974
- Induction of Parturition in Farm AnimalsJournal of Animal Science, 1974
- THE USE OF DEXAMETHASONE TRIMETHYLACETATE TO ADVANCE PARTURITION IN DAIRY COWSAustralian Veterinary Journal, 1973
- Estrogen Pre-Treatment of Corticoid Induced Parturition in Cattle2Journal of Animal Science, 1973
- Mammary Blood Flow and Glucose Uptake in Lactating Cows Given DexamethasoneJournal of Dairy Science, 1973
- Plasma Estrogen and Progesterone Levels After Mating, and During Late Pregnancy and Postpartum in Cows12Endocrinology, 1972
- Yield of colostrum and immunoglobulin in cattle at the first milking after parturitionAnimal Science, 1970
- The Role of Corticoids in ParturitionBiology of Reproduction, 1970
- THE COLORIMETRIC DETERMINATION OF PHOSPHORUSJournal of Biological Chemistry, 1925