Effects of PMSG doses on reproductive performance of Kurdi ewes artificially inseminated during breeding season
M Nosrati, M Tahmorespoor, M Vatandoost - 2011 - sid.ir
M Nosrati, M Tahmorespoor, M Vatandoost
2011•sid.irThis experiment was conducted to determine the REPRODUCTIVE PERFORMANCE of
Kurdi ewes which were artificially inseminated (AI). In total 240 Kurdi ewes, weighing
49.5±2.5 kg were used in the trail. The ewes were allocated randomly to one of four groups
(n= 60/in each group). For synchronizing, controlled internal drug release (CIDR) was
placed in the vagina of all individuals for 14 days. After removing the CIDR, pregnant mare's
serum gonadotropin (PMSG) hormone was intramuscularly injected at the dosages of 300 …
Kurdi ewes which were artificially inseminated (AI). In total 240 Kurdi ewes, weighing
49.5±2.5 kg were used in the trail. The ewes were allocated randomly to one of four groups
(n= 60/in each group). For synchronizing, controlled internal drug release (CIDR) was
placed in the vagina of all individuals for 14 days. After removing the CIDR, pregnant mare's
serum gonadotropin (PMSG) hormone was intramuscularly injected at the dosages of 300 …
Abstract
This experiment was conducted to determine the REPRODUCTIVE PERFORMANCE of Kurdi ewes which were artificially inseminated (AI). In total 240 Kurdi ewes, weighing 49.5±2.5 kg were used in the trail. The ewes were allocated randomly to one of four groups (n= 60/in each group). For synchronizing, controlled internal drug release (CIDR) was placed in the vagina of all individuals for 14 days. After removing the CIDR, pregnant mare's serum gonadotropin (PMSG) hormone was intramuscularly injected at the dosages of 300, 400, 500 and 600 IU in four groups of ewes. Cervical artificial insemination was performed after two days following CIDR withdrawal and hormone administration. The conception rates in groups I, II, III and IV were found as 63.7, 66.1, 65.8 and 67.9%, respectively. The mean litter size was significantly higher in groups II, III and IV (1.30, 1.34 and 1.46) than group I (1.11). The fecundity rate was lowest in group I (65.6%). Administration of 600 IU PMSG resulted in the highest (58.9%) multiple births (P< 0.05). These results suggest that 600 IU PMSG was more effective in increasing multiple births in the Kurdi ewes in breeding season.
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