Resumption of uterine and ovarian functions following dexamethasone-induced parturition in dairy cows
2000
Kask, K. | Kindahl, H. (Swedish University of Agricultural Sciences, Uppsala (Sweden). Dept. of Obsterics and Gynaecology) | Gustafsson, H. (Swedish Dairy Association, Eskilstuna (Sweden))
Parturitionswere induced in cows 2.5 weeks before term using dexamethasone. Sex of calf, calving performance, intervals between 1st injection of dexamethasone and parturition, as well as between parturition and shedding of placentas were recorded. Four cows had retained fetal membranes (RFM), 3 cows had fragments of placentas (F) during 5 days postpartum, and in 3 cows the puerperium was considered to be normal (N). For comparison, the cows were divided into these 3 groups. General clinical status and occurrence of vaginal discharge were monitored daily during 7 weeks postpartum (PP). Rectal palpations for uterine tone and position were performed every 3rd day starting on the 5th day PP. On the same days, uterine content, measurements of the diameter of the diameter of the cervix and uterine horns, and thickness of the uterine wall were recorded by ultrasonography (US). Resumption of the ovarian function was followed by US. Cows with RFM had significantly higher vaginal discharge scores than N-cows during the experimental period (p0.05). Also RFM-cows had more vaginal discharge during the first 11 days PP than F-cows (p0.05). The interval from calving to the last day of clinical signs was significantly shorter in N-cows than in RFM-cows (p0.05). Between days 20-32 PP, significantly more fluid was detected in the uterus of RFM-cows than N-cows (p0.05)
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