Factors influencing gestational length in mares: A review

Satué, K.; Muñoz-Lozano, Jose Felipe; Mota, Joana; Muñoz, A.

doi:10.1016/j.livsci.2010.09.011

Cited by 43 publications

(35 citation statements)

References 54 publications

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“…The moment of conception proved an important factor, as it was found that when conception occurs at the end of the breeding season, there is a significant reduction in gestation length compared to mares bred at the beginning of the breeding season, thus confirming the findings of Campitelli et al (1982), Macpherson and Paccamonti (2011) and Satué et al (2011a). The authors of these studies suggest that the difference is most likely due to better nutritional and temperature conditions during the breeding season, in addition to the influence of sunlight on the endocrine system of the mare.…”

Section: Discussionsupporting

confidence: 60%

“…In all of these studies, the mean gestational length ranged between 330 and 350 days (Satué et al, 2011a). It has been observed in Mangalarga Paulista breeding farms that their normal pregnancy is long, especially in primiparous mares.…”

Section: Introductionmentioning

confidence: 94%

“…For Koterba et al (1990), gestation periods of less than 320 days or more than 365 days are considered abnormal, and these may result in the birth of immature or post-mature foals, respectively (Satué et al, 2011a).…”

Section: Introductionmentioning

confidence: 99%

“…The estimation of gestational length is of great clinical and economic importance for the equine industry because it can be used to monitor foaling, thereby minimizing the risks to the mare and foal (Satué et al, 2011a). Another important aspect is the concern when pregnancy lasts more than 340 days, making owners and veterinarians cautious about the fetal and dam well-being, and this may lead to the equivocated decision of inducing parturition at the wrong moment and possibly the death of an immature foal.…”

Section: Introductionmentioning

confidence: 99%

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Factors affecting gestational length in the Mangalarga Paulista breed

Ferreira¹,

Meirelles²,

Guimarães³

et al. 2016

Anim Reprod

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The Mangalarga Paulista is a Brazilian horse breed that originated from a cross between Andalusian and Alter Real horses, and despite its national importance, no data exist regarding their gestational length. This study was conducted to determine the variation in gestation length and the influence of factors such as the sex of the foal, maternal age and parity, stallion and mating period. Retrospectively, data from 208 gestations of Mangalarga Paulista foals located in Piracaia, SP, Brazil, during the period from 1991 to 2012 were analyzed. The mean gestational length was 343.08 ± 0.66 days, with a range between 317 and 404 days. Gestation of mares carrying colts had a tendency to be longer than mares carrying fillies. Maternal parity significantly affected gestational length, with longer gestation for primiparous mares until the third gestation, shorter pregnancies between 4th and 8th gestation, and longer thereafter. Regarding mating period, mares that were mated at the end of the breeding season (January and February) had shorter pregnancies (P < 0.05). These results are of significant clinical and economic relevance for the equine industry, so that the monitoring of gestation and parturition can be performed effectively.

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Section: Discussionsupporting

confidence: 60%

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Factors affecting gestational length in the Mangalarga Paulista breed

Ferreira¹,

Meirelles²,

Guimarães³

et al. 2016

Anim Reprod

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“…Mating season is the most important environmental factor affecting the GL in mares (Howell and Rollins 1951). Many studies have shown that the gestation length shortens as the breeding season progresses (Satué et al 2011b). However, short gestations have also been observed in mares bred early in the breeding season (Howell and Rollins 1951, Hintz et al 1992, Davies Morel et al 2002.…”

Section: Introductionmentioning

confidence: 99%

Gestation lengths of Finnhorse and Standardbred mares in Finland: effects of breeding season and reproductive status

Reilas

Virtala²,

Katila³

2014

PHK

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The aim of this study was to investigate factors influencing the gestation length (GL) in Finnhorses (FH) and in American Standardbreds (SB), with particular emphasis on the effect of the mare's reproductive status. Data including15 breeding seasons (1991-2005) was obtained from Suomen Hippos, the Finnish trotting and breeding association. From the records, 8952 pregnancies in 3649 SB mares and 4579 pregnancies in 2149 FH mares fulfilled the inclusion criteria: artificial insemination (AI) using either fresh or transported semen, a viable foal, and a GL of 300-390 days (last AI-parturition). The effects of breed, mare age and reproductive status (maiden, barren, rested or foaled) at the beginning of the mating season, parity, month and year of mating, stallion station, and sex of the foal on GL were estimated using linear mixed models. All models were fitted using the residual maximum likelihood estimation method. The GL in foaled mares was significantly shorter than in maiden, barren or rested mares (SB: P< 0.0001; FH: P< 0.01). In maiden, barren and rested mares, the GLs were similar. The mating month had a significant effect on the GL (P<0.0001). The longest and shortest gestations were found in mares mated in April and August, respectively. The SB mares mated in February-March had shorter pregnancies than mares mated in April (P< 0.01). The FH mares carried their foals significantly longer (adjusted mean 334.8 days, 95 % CI 334.2-335.5) than SB mares (adjusted mean 331.7 days, 95 % CI 331.2-332.3 days) (P< 0.0001). In both breeds, primiparous mares had longer gestations than multiparous mares (P< 0.0001). The GL between different age groups did not differ in the SB, but young FH mares had 2.3 days shorter gestation than very old mares (P< 0.05). Colt foals were carried 1.8 days longer than fillies in both breeds (P< 0.0001). In conclusion, the relationship between mating date and gestation length in Standardbred mares was positive from March to April and negative from April to August. A short mean GL of the SB mares in Finland supports the influence of latitude on GL. Reproductive status of the mare at the time of AI had a significant effect on the GL. This finding suggests that the uterine environment in early pregnancy may affect the length of gestation.

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Growth and Development of the Lusitano Foal on Extensive Systems

Fradinho

2020

Advances in Animal Health, Medicine and Production

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vi concretização de uma parte deste trabalho. Um agradecimento muito especial à Doutora Ana Catarina Vale, também do IST, por todo o envolvimento e colaboração nestes ensaios. Ao Dr. Nuno Bernardes, pela amizade e disponibilidade que sempre teve para nos acompanhar ao longo destes anos. Obrigada por todo o envolvimento nos trabalhos relativos à qualidade do osso (desde o campo até ao corte do "dito"), pelos RX e sua interpretação e pela revisão dos aspectos mais específicos relacionados com os problemas osteoarticulares. Às entidades e coudelarias que facultaram as suas instalações e efectivos. Este trabalho só foi possível graças ao seu envolvimento e colaboração:  Ao ex-Serviço Nacional Coudélico, na pessoa do seu Director à época, Dr. Costa Ferreira, o qual permitiu a inclusão da equipa da FMV no projecto POCI;  À Coudelaria de Alter, posteriormente incluída na ex-Fundação Alter Real, nas pessoas do seu Presidente Engº Vítor Barros e da sua Directora Dra. Idalina Trindade. Em particular, gostaria de agradecer a toda a equipa da Coudelaria de Alter que nos acompanhou e recebeu nos dias de trabalho de campo. À Dra. Maria José Correia, pelo seu empenho e pela sua boa disposição. Obrigada Zézinha, pela invulgar disponibilidade e pela franca amizade! Aos restantes ajudantes, Dra. Madalena Roquette, Sr. Ricardo Antunes, Sr. António Gomes e Sr. Ricardo Vicente, o meu sincero agradecimento;  À Coudelaria Nacional, posteriormente também integrada na ex-Fundação Alter Real, um agradecimento a todos os que de alguma forma colaboraram neste trabalho. Ao Dr. Mário Barbosa, ao Engº Francisco Beja ("dividido" depois também com a Coudelaria de Alter), ao Dr. Ricardo Agrícola, ao Dr. Vitor Grácio, ao Sr. João Francisco Gonçalves, ao Sr. João Fandinga, ao Sr. Lucílio Almeida e ao Sr. Manuel Pechorro (em memória);  Ao Sr. José Manuel de Mello (em memória), pelo pronto acolhimento e pelo entusiasmo com que recebeu este projecto na Coudelaria do Monte da Ravasqueira. Infelizmente a sua perda prematura não permitiu que pudéssemos seguir os seus animais para além de um primeiro ano. Um agradecimento especial a toda a equipa que nos acompanhou na Coudelaria, a Dra. Maria José Vila-Viçosa, o Sr. Júlio Jarego da Fonseca e o Sr. Mariano;  Ao Engº Manuel Campilho e ao seu filho Diogo Campilho, pelo pronto acolhimento deste projecto na Quinta da Lagoalva de Cima, pelo interesse e pela disponibilidade sempre demonstrados. Um agradecimento especial à restante equipa que nos acompanhou, ao Dr. Miguel Bliebernicht, ao Sr. António Rosa e ao Sr. Luís Mira (obrigada pelo contacto com os vossos cavalos de atrelagem e também pelos ensinamentos relativos a esta disciplina);  À Companhia das Lezírias, nas pessoas do seu Presidente à época, Engº Vítor Barros e da sua Administradora Dra. Ana Teresa Caseiro. Mais recentemente, um agradecimento muito especial ao seu actual Presidente, Engº António Saraiva, pelo seu interesse e incentivo. Em particular gostaria de agradecer a todos os que estiveram envolvidos no trabalho de campo, pela ajuda e pela...

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Factors influencing gestational length in mares: A review

Cited by 43 publications

References 54 publications

Factors affecting gestational length in the Mangalarga Paulista breed

Factors affecting gestational length in the Mangalarga Paulista breed

Gestation lengths of Finnhorse and Standardbred mares in Finland: effects of breeding season and reproductive status

Growth and Development of the Lusitano Foal on Extensive Systems

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