REPRODUCTIVE PERFORMANCE OF ZEL EWES WITH DIFFERENT DOSAGE OF ECG OUTSIDE THE NATURAL BREEDING SEASON

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NARENJI SANI R.; GHAZVINIAN KH.; MOEZIFAR M.

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Journal: Veterinary Research & Biological Products Year:2015 | Volume:28 | Issue:1(106) Page(s): 72-75

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Title

REPRODUCTIVE PERFORMANCE OF ZEL EWES WITH DIFFERENT DOSAGE OF ECG OUTSIDE THE NATURAL BREEDING SEASON

Author(s)

NARENJI SANI R. | GHAZVINIAN KH. | MOEZIFAR M. | Issue Writer Certificate

Keywords

ESTROUS SYNCHRONIZATIONQ3

ZEL EWEQ2

CIDRQ2

ECGQ2

Abstract

ESTROUS SYNCHRONIZATION is a valuable management tool that has been employed successfully in enhancing reproductive efficiency, particularly in cows, ewes and does (Kusina et al., 2000). OESTROUS SYNCHRONIZATION in small ruminants is achieved either by reducing the length of the luteal phase of the oestrous cycle with prostaglandin F2α or by artificially extending it with exogenous progesterone or potent progestagens A completely randomized design experiment was carried out using eighty ZEL EWEs during out of season breeding to compare different dosage of equine chorionic gonadotrophin (eCG) with controlled internal drug release (CIDR) dispensers to synchronize estrous. Intravaginal progestagen was administered for a 13-day period. Upon progestagen withdrawal, doses received 350, 400, 450 and 500 IU (eCG) intramuscularly. Teaser rams (1/8 ewes) were introduced 1 d after treatment removal to detect estrus. Ewes were subjected to fertile rams 40 h after CIDR removal. The results of this experiment showed that ECG was effective when used with CIDR. Different dosage of ECG treatments had not significant effect on estrus response (100% in all groups). Enhancing the level of ECG administration led to a increase in fecundity rate and lambing rate in this study.In conclusion the CIDR device with 450 and 500 IU can improve reproductive performance in ZEL EWEs comparable to 350 and 400 IU ECG.

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APA: Copy

NARENJI SANI, R., GHAZVINIAN, KH., & MOEZIFAR, M.. (2015). REPRODUCTIVE PERFORMANCE OF ZEL EWES WITH DIFFERENT DOSAGE OF ECG OUTSIDE THE NATURAL BREEDING SEASON. VETERINARY RESEARCHES BIOLOGICAL PRODUCTS (PAJOUHESH-VA-SAZANDEGI), 28(1(106)), 72-75. SID. https://sid.ir/paper/200892/en

Vancouver: Copy

NARENJI SANI R., GHAZVINIAN KH., MOEZIFAR M.. REPRODUCTIVE PERFORMANCE OF ZEL EWES WITH DIFFERENT DOSAGE OF ECG OUTSIDE THE NATURAL BREEDING SEASON. VETERINARY RESEARCHES BIOLOGICAL PRODUCTS (PAJOUHESH-VA-SAZANDEGI)[Internet]. 2015;28(1(106)):72-75. Available from: https://sid.ir/paper/200892/en

IEEE: Copy

R. NARENJI SANI, KH. GHAZVINIAN, and M. MOEZIFAR, “REPRODUCTIVE PERFORMANCE OF ZEL EWES WITH DIFFERENT DOSAGE OF ECG OUTSIDE THE NATURAL BREEDING SEASON,” VETERINARY RESEARCHES BIOLOGICAL PRODUCTS (PAJOUHESH-VA-SAZANDEGI), vol. 28, no. 1(106), pp. 72–75, 2015, [Online]. Available: https://sid.ir/paper/200892/en

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