Fertility in the ewe following cervical insemination with fresh or frozen–thawed semen at a natural or synchronised oestrus

Donovan, A.; Hanrahan, J. P.; Kummen, E; Duffy, P.; Boland, M.P.

doi:10.1016/j.anireprosci.2003.12.014

Cited by 81 publications

(74 citation statements)

References 28 publications

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“…www.intechopen.com Artificial Insemination in Farm Animals 30 (Hill et al, 1998), 29 to 52% (Donovan et al, 2001(Donovan et al, , 2004, and 42.86 to 53.33 % (Stefanov et al, 2006).…”

Section: The Use Of Fresh Cooled Chilled Frozen Semenmentioning

confidence: 99%

“…The best time of insemination could be 46 (Fernandez-Abella et al, 2003), 48 to 72 (Karagiannidis et al, 2001), and 58 to 63 (Donovan et al, 2001(Donovan et al, , 2004 hours after the pessary removal. Hill et al (1998) reported that the type and dosage of PMSG (Pregnant Mare Serum Globulin -200 IU -62.4%; 250 IU -72.9%; 300 IU -79.1%; 375 IU and above -69.4%) had a significant effect on the conception rate in artificial insemination.…”

Section: Time Of Insemination After Oestrus Synchronisationmentioning

confidence: 99%

See 1 more Smart Citation

Artificial Insemination of Sheep - Possibilities, Realities and Techniques at the Farm Level

Kukovics¹,

Gyoker²,

Németh³

et al. 2011

Artificial Insemination in Farm Animals

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“…www.intechopen.com Artificial Insemination in Farm Animals 30 (Hill et al, 1998), 29 to 52% (Donovan et al, 2001(Donovan et al, , 2004, and 42.86 to 53.33 % (Stefanov et al, 2006).…”

Section: The Use Of Fresh Cooled Chilled Frozen Semenmentioning

confidence: 99%

Section: Time Of Insemination After Oestrus Synchronisationmentioning

confidence: 99%

Artificial Insemination of Sheep - Possibilities, Realities and Techniques at the Farm Level

Kukovics¹,

Gyoker²,

Németh³

et al. 2011

Artificial Insemination in Farm Animals

View full text Add to dashboard Cite

“…A recent study in nulliparous dairy heifers emphasized that most variations in conception rates was attributable to oestrus detection, pelvic size and breeding season (Donovan et al, 2003). The farm, the inseminator and semen deposition site also contributed to variations of fertility in ruminants (Ron et al, 1984;Donovan et al, 2004;Verberckmoes et al, 2004;Paulenz et al, 2005). In goats, a recent report by Salvador et al (2005) clearly indicated that the depth of semen deposition is a determining factor for pregnancy rates, with higher fertility achieved when the insemination gun reached the uterus, as observed in the past by Ritar and Salamon (1983).…”

mentioning

confidence: 99%

Short-duration insemination with frozen semen increases fertility rate in nulliparous dairy goats

Houdeau¹,

Furstoss²,

Forgerit³

et al. 2008

Animal

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Standard artificial insemination (AI) using a speculum in dairy goats does not result in acceptable fertility rates in nulliparous does. An explanation might be the difficulties to pass the cervical canal in nulliparous females with the insemination gun, increasing the time needed for semen deposition. Nulliparous Alpine dairy goats were used to evaluate whether time interval from insertion to withdrawal of the speculum is a factor influencing pregnancy rates to first AI with frozenthawed semen. Oestrus was synchronized using fluorogestone acetate intravaginal sponges (FGA, 40 mg) for 11 days, associated with 50 mg i.m. of cloprostenol and 250 IU i.m. eCG 48 6 2 h before sponge removal. In the first experiment (n 5 52; 3 herds), the average duration of the AI procedure was 42 6 10 s, with a median of 39 s. AI performed in less than 39 s resulted in higher pregnancy rates (75%, n 5 28) than AI lasting for more than 39 s (46%, n 5 24). In the second experiment, does (n 5 325; 5 herds) were randomly assigned into two treatment groups according to a short (20 s) or long (60 s) AI procedure. We showed that the duration of AI affected fertility after a first insemination, and that pregnancy rate was significantly improved using a shortduration AI (61.2%; n 5 169) compared with a long-duration AI (44.2%; n 5 156). We have previously shown in the ewe that genital stimulation during AI enhanced uterine motility. Other authors reported a negative correlation between increased uterine motility at the time of AI and fertility rates in small ruminants. The results of this study suggest that rapid semen deposition may limit the reflex activation of uterine contractions provoked by the speculum and the movement of the insemination gun, and thus ameliorates reproductive performance to first AI in nulliparous goats.Keywords: goat, nulliparous, artificial insemination, fertility, uterus IntroductionArtificial insemination (AI) in dairy goats is less commonly used than in other domestic animals. Nevertheless, the number of does inseminated has progressively increased during the last two decades, encouraged by sanitary reasons and by the introduction of genetic selection in breeding programmes (Ponsart et al., 2004;Verberckmoes et al., 2004). Both multiparous and nulliparous goats are used in AI programmes but fertility in nulliparous does is currently limited, being irregular and low compared with multiparous females (Leboeuf et al., 1998), often leading breeders to prefer natural mating for first conceptions. A recent study in nulliparous dairy heifers emphasized that most variations in conception rates was attributable to oestrus detection, pelvic size and breeding season (Donovan et al., 2003). The farm, the inseminator and semen deposition site also contributed to variations of fertility in ruminants (Ron et al., 1984;Donovan et al., 2004;Verberckmoes et al., 2004;Paulenz et al., 2005). In goats, a recent report by Salvador et al. (2005) clearly indicated that the depth of semen deposition is a determining factor for pregnancy...

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“…Estes resultados foram próximos aos verificados por Donovan et al (2004), que não observaram diferença significativa em taxas de prenhez entre ovelhas inseminadas com sêmen fresco durante o estro natural (82%) e àquelas submetidas à sincronização (70%). …”

Section: Resultsunclassified

Inseminação artificial de ovelhas da raça Santa Inês com sêmen diluído em água de coco in natura e em pó

Figueirêdo¹,

Nunes²,

Cordeiro³

et al. 2007

RBCV

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ResumoO objetivo deste estudo foi avaliar a fertilidade de ovelhas após inseminação (IA) com sêmen diluído em água de coco in natura (ACIN) e em pó (ACP-102) e resfriado a 4°C por 24 horas, durante a época chuvosa e seca no estado do Ceará. As ovelhas (n=208) foram previamente submetidas a tratamento hormonal com MAP (50mg) e e.C.G. (200 UI). As ovelhas foram distribuídas em quatro grupos experimentais para a inseminação artificial: grupo 1 (época chuvosa + ACIN = 47); grupo 2 (época chuvosa + ACP-102 = 47); grupo 3 (época seca + ACIN = 60); e grupo 4 (época seca + ACP-102 = 54). As IA foram realizadas entre 50 e 55 horas após a retirada das esponjas com sêmen resfriado por 24 horas. Não foi observada diferença significativa (P>0,05) entre os diluentes testados (ACIN=74,77% vs. ACP-102=72,28%). Com relação à época da IA, verificou-se uma maior taxa de prenhez durante a época seca (81,58%) do que na chuvosa (63,82%) (P<0,05). Conclui-se que ambos diluentes à base de água de coco apresentam boa capacidade conservadora, pois mantêm o sêmen ovino viável e com níveis satisfatórios de fertilidade mesmo após 24 horas de resfriamento a 4°C. Independentemente do diluente utilizado, a época da IA no estado do Ceará pode influenciar a taxa de prenhez em ovelhas.Palavras-chave: inseminação artificial, ovelhas, ACIN, ACP-102, resfriamento. AbstractThe aim of this study was to evaluate the fertility of ewes after artificial insemination (AI) with semen extended in coconut water in natura (INCW) and in powder (PCW-102) and cooled at 4°C for 24h, during the rainy and dry period in the Ceará State. The ewes (n=208) were previously submitted to a hormonal treatment with MPA (50mg) and e.C.G. (200 IU). The ewes were distributed into four experimental groups for AI: group 1 (rainy period + INCW = 47); group 2 (rainy period + PCW-102 = 47); group 3 (dry period + INCW = 60); and group 4 (dry period + PCW-102 = 54). The AI were performed between 50 and 55h after sponge removal with semen cooled for 24h. It wasn't observed statistical difference (P>0.05) between the extenders tested (INCW=74.77% vs. PCW-102=72.28%). Regarding AI period, it was verified higher pregnancy rate (81.58%) during the dry period in comparison with the rainy period (63.82%) (P<0.05). In conclusion, both extenders based on coconut water present good preservative capacity, since the ram semen is maintained viable and with satisfactory values of fertility after 24h of cooling at 4°C. Independently of extender used, the AI rain period in Ceará State can influence the pregnancy rate in ewes.Keywords: artificial insemination, ewes, INCW, PCW-102, cooling. IntroduçãoA inseminação artificial é uma técnica que permite a aceleração dos benefícios advindos do melhoramento animal, já que o patrimônio genético dos melhores reprodutores pode ser utilizado de forma mais eficiente, podendo ser difundido para um maior número de fêmeas (Aguinski, 1993).O emprego de sêmen resfriado vem-se tornando cada vez mais popular, aumentando significativamente seu uso durante a última décad...

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Fertility in the ewe following cervical insemination with fresh or frozen–thawed semen at a natural or synchronised oestrus

Cited by 81 publications

References 28 publications

Artificial Insemination of Sheep - Possibilities, Realities and Techniques at the Farm Level

Artificial Insemination of Sheep - Possibilities, Realities and Techniques at the Farm Level

Short-duration insemination with frozen semen increases fertility rate in nulliparous dairy goats

Inseminação artificial de ovelhas da raça Santa Inês com sêmen diluído em água de coco in natura e em pó

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