Fertility Rates of Ewes Treated with Medroxyprogesterone and Injected with Equine Chorionic Gonadotropin plus Human Chorionic Gonadotropin in Anoestrous Season

Santos, Ivo Walter dos; Binsfeld, L. C.; Weiss, Romildo Romualdo; Kozicki, Luiz Ernandes

doi:10.4061/2010/978520

Cited by 11 publications

(10 citation statements)

References 16 publications

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“…The lambing rate in the differently treated ewes was 61.5, 88.5 and 92.3%, respectively. The results of the present study are compatible with the study results of Santos et al (2010) who demonstrated that short-term progestagen treatment does not improve the fertility of ewes, as was previously reported (Husein et al, 2007;Ustuner et al, 2007;Amer and Hazzaa, 2009). In the present study, the multiple birth rate and litter size in the treatment groups were lower than the values observed in hormone treated native ewes of Turkey (Askin, 1988;Koyuncu and Yerlikaya, 2007;Karaca et al, 2009).…”

Section: Resultssupporting

confidence: 94%

The effects of short-mid-long term intravaginal sponge application on reproductive performance of karacabey Merino ewes in the anestrous season

Altinçekiç

Koyuncu

2017

IJAR

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The aim of the present paper was to investigate the efficiency of different progestagen treatment methods in combination with Pregnant Mare Serum Gonadotrophin (PMSG) in Merino ewes outside the breeding season. A total of 78 ewes (2 to 4 years old) with a mean bodyweight of 58.4 kg and an average body condition score (BCS) of 3.5 were used in the trial. The ewes were randomly divided into 3 equal groups [n= 26]. Intravaginal progestagen sponges containing Fluorogestone Acetate (FGA; 30 mg) were inserted intravaginally for different periods (7_days: short-term; 10_days: mid-term, 14_days: long-term). In all cases, 500 IU PMSG was administered intramuscularly at sponge withdrawal. The oestrus response, lambing rate, multiple birth rate, fecundity and litter size were [65.4, 61.5, 18.8 %, 0.77 and 1.25] in the short-term group; 80.8, 88.5, 34.8 %, 1.31 and 1.48 in the mid-term group; and 96.2, 92.3, 62.5 %, 1.50 and 1.63 in the long-term group, respectively. Oestrus manifestation and multiple birth rate were greater in long-term than in mid-and short-term groups, whereas for lambing rate, fecundity and litter size, better results were obtained in long-and mid-term than in short-term protocol. In conclusion, in Merino ewes, oestrus synchronisation outside the breeding season with long and mid-term progestagen treatment was found to be more effective than short-term treatment.

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Section: Resultssupporting

confidence: 94%

The effects of short-mid-long term intravaginal sponge application on reproductive performance of karacabey Merino ewes in the anestrous season

Altinçekiç

Koyuncu

2017

IJAR

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“…This indicated that FIS/eCG (400 IU) was an optimum scheme for estrus synchronization in Lanzhou fattailed ewes. The findings were highly consistent with early reports of Santos et al (2010) and Bianor et al (2012). The results of Santos et al (2010) indicated that the pregnancy and lambing rates were 86% vs. 56%, and 120% vs. 56% in ewes intramuscularly injected with eCG 400 IU and eCG 400 IU plus hCG 200 IU at the time of intravaginal sponges.…”

Section: Discussionsupporting

confidence: 93%

“…Hackett et al (1981) reported that 83% ewes (24/29) had viable foetuses after 15 mg PGF2α and 500 IU eCG treatments. Santos et al (2010) reported that the ewes were injected intramuscularly with eCG 400 IU and eCG 400 IU plus hCG 200 IU at the time of intravaginal sponge (containing 60 mg medroxyprogesterone acetate, MAP) withdrawal. The estrus rates of both treatments were 90% and 86%.…”

Section: Introductionmentioning

confidence: 99%

“…The estrus rates of both treatments were 90% and 86%. The use of the MAP-eCG is the best choice to improve the fertility rate in ewes (Santos et al 2010). Bianor et al (2012) reported the estrus and ovulation were efficiently synchronized in Santa Inês ewes that were intramuscularly injected with 0.5 mL cloprostenol and 300 UI eCG, or 0.5 mL cloprostenol and 20 mg FSH at the moment of sponge withdrawal (Bianor et al 2012).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Estrus synchronization schemes and application efficacies in anestrus lanzhou fat-tailed ewes

Wei

Chen

Wei³

et al. 2015

Journal of Applied Animal Research

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This study aims to investigate the estrus efficacy of FIS (fluorogestone intravaginal sponges)/eCG (equine chorionic gonadotropin) and cloprostenol treatments to establish the optimum protocols for estrus synchronization in ewes. Forty-two ewes were assigned into groups A (FIS/eCG group) and B (CLO (cloprostenol) group). Each group was randomly divided into three subgroups (n = 7) according to the dose of eCG (ECG1, ECG2 and ECG3) or cloprostenol (CLO1, CLO2 and CLO3). The estrus rates, lambing rates and average litter sizes were accounted. Serum concentrations of progesterone (P4), folliclestimulating hormone (FSH) and luteinizing hormone were determined. Selected optimum schemes were employed in 636 ewes in four sheep farms. Estrus rates of groups A and B were 85.72% and 57.14%. Estrus onset times (EOTs) were 53.91 ± 12.26 and 46.41 ± 4.65 h for groups A and B. EOT of ECG1 was longer than that of CLO3 (P < .05). Lamb numbers, lambing rate and litter size of group B were lower than those of group A. The maximum and minimum lambing rates were calculated in ECG3 and CLO1 (157 vs. 57). On day 11, higher P4 values (P < .05) were determined of ECG3 and CLO1 compared to CLO2 and CLO3 subgroups. FSH concentration of ECG1 was significantly higher than that in group B (P < .05). Application results showed that estrus rate, pregnancy rate and lambing rates of ECG3 and CLO3 protocols were 95.97% vs. 70.91%, 91.37% vs. 88.89% and 149.87% vs 132.69% (P < .05), respectively. FIS/eCG and cloprostenol improved estrus synchronization. Injection of 400 IU eCG after FIS withdrawal was an optimum protocol for estrus synchronization of ewes. ARTICLE HISTORY

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“…Se introdujo un hilo de algodón para extraerlas (Fukui et al 1987;Espinoza et al 2003). Las esponjas se desinfectaron con etanol al 90%; se dejaron secar en cámara de flujo laminar; luego se impregnó la superficie con 60 mg de MAP (Laboratorios Afford, obtenidos de Laboratorios Calox, Costa Rica) (Fukui et al 1999;Zarwaki 2001;Ungerfeld et al 2003;Barrett et al 2004;Catalano et al 2005;Catalano et al 2007;Santos et al 2010); diluidos en 1 mL de etanol al 90%; dispersando el fármaco, en forma lineal, sobre la superficie (Robinson et al 1968). Posteriormente, se secaron, en una cámara de flujo laminar con protección de la luz solar.…”

Section: Preparación De Las Esponjasunclassified

Medroxiprogesterona acetato para la elaboración de dispositivos intravaginales caseros usados en la sincronización del estro en ovinos de pelo: Evaluación de su eficacia, sus efectos secundarios y comparación con un dispositivo comercial en hatos de Costa Rica.

González

Luna-Tortós²

2017

Ciencias Veterinarias

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Medroxiprogesterona acetato para la elaboración de dispositivos intravaginales caseros usados en la sincronización del estro en ovinos de pelo: Evaluación de su eficacia, sus efectos secundarios y comparación con un dispositivo comercial en hatos de Costa Rica. Resumen El objetivo del trabajo fue determinar la eficacia farmacológica y los efectos secundarios de un dispositivo intravaginal de fabricación casera elaborado con acetato de medroxiprogestrona para la sincronización del estro en ovinos de pelo. Se incluyeron un total de 78 hembras adultas, multíparas y ciclando en un estudio de dos etapas. En la primera etapa se utilizaron 18 animales con el objetivo de analizar la eficacia y los efectos secundarios del dispositivo de elaboración casera. En la segunda etapa se utilizaron 60 hembras divididas aleatoriamente en dos grupos: (G1) dispositivo casero (n-30), (G2) dispositivo comercial (n-30). El fin de esta etapa fue comparar la tasa de sincronización de celos y la tasa de concepción por monta natural. Para la sincronización se colocó el dispositivo con 60mg de acetato de medroxiprogesterona durante 12 días, con inyección de 200 UI de eCG y 5 mg de dinoprost trometamina al retirar del dispositivo. Se evaluaron andrológicamente 13 machos, de los cuales 4 fueron descartados por ser insatisfactorios y se utilizaron 8 machos satisfactorios durante ambas fases del estudio. En ambas etapas la presentación de celo fue nula durante la presencia del dispositivo y 100% presentaron celo 48 horas después de su retiro. Los efectos adversos en la primera etapa fueron: Vaginitis leve al día 12 en todas las hembras, 3 presentaron adherencias, 2 hembras con aumento de fibrinógeno el día 12 y una disminución general de los leucocitos. En la segunda etapa no hubo diferencias en la sincronización entre los grupos, la tasa de concepción fue de 80,0% y 76,7% en G1 y G2, respectivamente. Basado en los resultados de este trabajo, el dispositivo intravaginal de fabricación casera es efectivo para la sincronización del estro en ovinos de pelo y para la obtención de altas tasas de preñez por monta natural.Palabras clave: Sincronización del estro, ovinos, medroxiprogesterona acetato. AbstractThe goal of our study was to determine the pharmacological efficacy and adverse effects of a homemade intravaginal device containing medroxyprogesterone acetate for estrus synchronization in hair ewes. A total of

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Fertility Rates of Ewes Treated with Medroxyprogesterone and Injected with Equine Chorionic Gonadotropin plus Human Chorionic Gonadotropin in Anoestrous Season

Cited by 11 publications

References 16 publications

The effects of short-mid-long term intravaginal sponge application on reproductive performance of karacabey Merino ewes in the anestrous season

The effects of short-mid-long term intravaginal sponge application on reproductive performance of karacabey Merino ewes in the anestrous season

Estrus synchronization schemes and application efficacies in anestrus lanzhou fat-tailed ewes

Medroxiprogesterona acetato para la elaboración de dispositivos intravaginales caseros usados en la sincronización del estro en ovinos de pelo: Evaluación de su eficacia, sus efectos secundarios y comparación con un dispositivo comercial en hatos de Costa Rica.

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