Use of two doses of cloprostenol in different intervals for estrus synchronization in hair sheep under tropical conditions

Tropical Animal Health and Production
Sheylla Foligno de Carvalho Menezes de AlmeidaFelipe Zandonadi Brandão

Abstract

This study evaluated the effect of two doses of prostaglandin at different intervals on reproductive parameters of crossbred ewes. In Experiment 1, 30 ewes received two doses of 120 μg cloprostenol at 7 (G 7 days), 9 (G 9 days), or 11.5 (G 11.5 days) days apart. Ultrasound assessments were performed from the first and second cloprostenol administration for 5 days or ovulation detection. Estrus signs were checked by a teaser male. Plasma progesterone concentration was measured before each cloprostenol dose. In Experiment 2, 95 ewes were allocated into the same treatments and after the second dose, ewes in estrus were mated. At 30 days after breeding, pregnancy diagnosis was conducted and prolificacy was evaluated at lambing. In Experiment 1, at the first cloprostenol administration, 50% of ewes had an active CL and all showed estrus. At the second administration, 66.7% of ewes had an active CL and one did not present estrus. There was no difference (P > 0.05) after the second dose for as follows: overall estrous response (90%), interval from cloprostenol administration to estrous onset (42.0 ± 4.9 h), estrus duration (31.5 ± 2.1 h), ovulation rate (100.0%), and number of ovulations (1.5 ± 0.3). In Experiment 2, both pregnancy an...Continue Reading

References

Sep 1, 1978·Journal of Reproduction and Fertility·S AcritopoulouG E Lamming
Jan 1, 1980·Journal of Reproduction and Fertility·S Acritopoulou, W Haresign
May 20, 2003·Animal Reproduction Science·E RubianesB Carbajal
Sep 16, 2004·Reproduction in Domestic Animals = Zuchthygiene·A MenchacaE Rubianes
Mar 18, 2011·Animal Reproduction Science·Pawel M BartlewskiJennifer L Giffin
Feb 14, 2012·Animal Reproduction Science·J A AbeciaA González-Bulnes
Sep 26, 2014·Tropical Animal Health and Production·Mario Felipe Alvarez BalaroFelipe Zandonadi Brandão
Jan 8, 2016·Tropical Animal Health and Production·Tarcísio Alves TexeiraFelipe Zandonadi Brandão

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Citations

Sep 29, 2021·Tropical Animal Health and Production·Nasir HameedSyed Murtaza Hassan Andrabi

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