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EFFICACY OF COMMERCIALLY AVAILABLE LUTEOLYTIC AGENTS IN HOLSTEIN-FRIESIAN COWS

Abdul Sattar

Research Institute for Physiology of Animal Reproduction, Bhunikey (Pattoki), Distt. Kasur, Pakistan

Abstract

     Peripheral plasma progesterone concentrations and time interval from treatment to oestrus in 12 Holstein-Friesian cows after treatment with three luteolytic agents (Dinoprost Tromethamine, Cloprostenol Sodium and dextro-rotatory D-Cloprostenol) at day-10 of the oestrus cycle were studied. The plasma progesterone concentrations at the time of treatment were 7.33 ± 0.75, 7.77 ± 0.85, 7.97 ± 0.32 and 8.07 ± 0.27 hg/ml in Dinoprost Tromethamine, Cloprostenol Sodium and dextro-rotatory D-Cloprostenol treated and untreated control cows, respectively, the difference was non-significant. In the morning of day-11 of the oestrus cycle, significantly (P<0.05) lower plasma progesterone concentrations were recorded in the Dinoprost Tromethamine and Cloprostenol Sodium treated cows as compared to control cows but the difference of dextro-rotatory D-Cloprostenol treated cows with that of control cows was non-significant. On the other hand, all the treated groups showed significantly (P<0.05) lower plasma progesterone concentrations as compared to that of control cows starting from the evening of day-11 till the morning of day-13 of the oestrus cycle. The plasma progesterone concentrations decreased to 0.80 ± 0.10, 0.85 ± 0.05 and 0.70 ± 0.10 hg/ml at the onset of oestrus in Dinoprost Tromethamine, Cloprostenol Sodium and dextro-rotatory D-Cloprostenol treated cows within 68.00 ± 4.00, 64.00 ± 8.00 and 88.00 ± 8.00 hours after the treatment, respectively.

Key words: Luteolytic agents, cows, progesterone concentrations
 
   

ISSN 0253-8318 (Print)
ISSN 2074-7764 (Online)



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