TY  - JOUR
T1  - Effect of Different Method GnRH-PGF<SUB>2 </SUB> Treatment on Induced of Estrus and Pregnancy in Breeding Season in Awassi Ewes
AU - , A.K. Zonturlu AU - , F. Aral AU - , U. Yavuzer 
JO  - Journal of Animal and Veterinary Advances
VL  - 8
IS  - 4
SP  - 660
EP  - 663
PY  - 2009
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2009.660.663
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2009.660.663
KW  - Ewes
KW  -GnRH
KW  -PGF2
KW  -estrus induction
KW  -intramuscular
KW  -ultrasonography
AB  - The object of this study was to investigate, the effect of PGF<SUB>2α</SUB> administrated on 5 and 7 d following GnRH treatment on estrus and pregnancy during the breeding season in awassi ewes. A total of 60 ewes 3-5 years old were used in this experiment. The ewes were divided into 3 groups (20 ewes/group) in breeding season. First group (control) was treated with the PG-10 day protocol consisting of 2 intramuscular (i.m.) doses of PGF<SUB>2α</SUB> analogue (250 μg of D-Cloprostenol/dose). The second group received intramuscular injection of GnRH analogue (busereline) and 5 day later an i.m. injection of PGF<SUB>2α</SUB>. In the 3 groups were treated with GnRH followed, 7 days later, by an i.m. injection of 250 μg of prostaglandin F<SUB>2α</SUB>. After the detection of estrus, the ewes were inseminated with 0.2 mL fresh sperm. Pregnancy was determined using ultrasonography on day 30 after the AI. Estrus response was 90% in Group 1, 90% in Group 2 and 35% in Group 3 (p<0.001). The pregnancy rate was 77.8% in Group 1, 83.3% in Group 2 and 42.8% in Group 3 (p<0.05). Lambing rate was 77.8% in Group 1, 83.3% in Group 2 and 42.8% in Group 3 (p<0.05). These results suggest that effect of induction estrus and pregnancy and lambing rate after GnRH and 5 days later an i.m. injection of prostaglandin F<SUB>2α </SUB>were higher than GnRH and PGF<SUB>2α </SUB>treatment followed 7 days injection of PGF<SUB>2α</SUB>. But comparable to PGF<SUB>2α</SUB> treatment with 10 days intervals.
ER  -