Ovarian cysts and their consequences on the reproductive performance of swine herds

Castagna, C; Peixoto, Carlos H.; Bortolozzo, Fernando Pandolfo; Wentz, Ivo; Neto, Guilherme Borchardt; Ruschel, F

doi:10.1016/j.anireprosci.2003.08.004

Cited by 69 publications

(79 citation statements)

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“…It is known that the presence of ovarian cysts can affect the return to estrus rates, farrowing rates, and number of anestrual sows (Castagna et al, 2004). However, in the present study, the normal reproductive history of the donor sows and the excellent quality of the embryos collected indicate that the follicular cysts were non-functional, thus causing no interference with the reproductive cycle, as has been previously reported for single cysts (Ryan and Raeside, 1991).…”

Section: Discussionsupporting

confidence: 68%

“…A greater risk of having cysts on ovaries was observed in fall and winter, compared with spring, which agrees with results reported from Italy (Gherpelli and Tarocco, 1996). In contrast, studies from Brazil indicated that the time of year had no influence on the incidence of ovarian cysts (Castagna et al, 2004). Moreover, in Canada the incidence of cysts was greater in spring than in fall (Liptrap and Doble, 1981).…”

Section: Discussionmentioning

confidence: 86%

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Factors of importance when selecting sows as embryo donors

Nohalez

Martínez

Reixach³

et al. 2017

Animal

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The improvement in porcine embryo preservation and non-surgical embryo transfer (ET) procedures achieved in recent years represents essential progress for the practical use of ET in the pig industry. This study aimed to evaluate the effects of parity, weaning-to-estrus interval (WEI) and season on reproductive and embryonic parameters at day 6 after insemination of donor sows superovulated after weaning. The selection of donor sows was based on their reproductive history, body condition and parity. The effects of parity at weaning (2 to 3, 4 to 5 or 6 to 7 litters), season (fall, winter and spring), and WEI (estrus within 3 to 4 days), and their interactions on the number of corpus luteum, cysts in sows with cysts, number and quality of viable and transferable embryos, embryo developmental stage and recovery and fertilization rates were evaluated using linear mixed effects models. The analyses showed a lack of significant effects of parity, season, WEI or their interactions on any of the reproductive and embryonic parameters examined. In conclusion, these results demonstrate that fertilization rates and numbers of viable and transferable embryos collected at day 6 of the cycle from superovulated donor sows are not affected by their parity, regardless of the time of the year (from fall to spring) and WEI (3 or 4 days).Keywords: pig, embryo donor, parity, season, weaning-to-estrus interval Implications A key factor that has received very little attention in the field of porcine embryo transfer (ET) is the selection of embryo donors. Results hereby showed that donor parity (2 to 7), season (fall, winter or spring) and weaning-to-estrus interval (WEI) (3 to 4 days) does not influence embryo quantity or quality. The ability to use donor sows with a wide range of parity and over a long period of time simplifies the application of the ET programs in donor farms, as these types of sows are highly available in nucleus farms.

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Section: Discussionsupporting

confidence: 68%

Section: Discussionmentioning

confidence: 86%

Factors of importance when selecting sows as embryo donors

Nohalez

Martínez

Reixach³

et al. 2017

Animal

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“…Quando se desenvolve cisto individual não se pode dizer que há transtornos hormonais, mas pode-se afirmar que a causa está relacionada com o desenvolvimento folicular, pois na maior parte das vezes o número de folículos que está em desenvolvimento é normal (SCHNURRBUSCH e SCHARFE, 1991;NASCIMENTO e SANTOS, 2002). O efeito do estresse também é uma das causas que aumentam a incidência de cistos ovarianos, fato este que implica na redução da fertilidade ou infertilidade completa (SCHARFE e SCHNURRBUSCH, 1990). CASTAGNA et.…”

Section: Resultsunclassified

Aspectos Macroscópicos Dos Ovários De Matrizes Suínas, Oriundas De Granjas Da Microrregião De Rio Verde-Go E Descartadas Para Abate Por Motivos Diversos

Moreira

Pilati

Dick

et al. 2006

AVS

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-There are many known causes for culling of sows in a herd, with reproductive problems standing as one of the major ones. In this scenary, replacement rates of 39-40% are considered acceptable in the pig industry. This study aimed to determine the relationship between functional ovarian condition in reproductively mature swine females and causes for culling. Hybrid Large White x Landrace females from 10 pig farms in Rio Verde-GO, slaughtered during the period from March to July 2002, had their ovaries analyzed by macroscopic examination and weighing. Decrease in production, advanced age, and low body condition score were the most common reasons for culling. From 330 pairs of ovaries analyzed under macroscopic examination, 90.6% were from cyclic females both on the follicular (46.4%) or the luteal (44.2%) phases, 7.6% had ovarian cysts, and 1.82% were in anestrus. The mean weight of ovaries was 8.8 g, with females with cystic ovaries or in anestrus having the heaviest (31.9 g) and the lightest ovaries (3.7 g). A total of 98.8% of all animals had ovaries showing normal cyclicity, despite the decrease in production. These results showed no associations between the difference in ovary weight and stages of the estrous cycle, and between causes of culling and functional conditions of the ovaries.Key-words: sow, reproduction; ovaries; culling.RESUMO -Muitas são as causas já identificadas que determinam o descarte de matrizes suínas, onde as principais são de ordem reprodutiva, admitindo-se como aceitável uma taxa de reposição em granjas comerciais de 39-40% ao ano. O presente estudo foi realizado com o objetivo de determinar a relação entre a condição funcional encontrada nos ovários de matrizes suínas em produção com a causa de descarte destas fêmeas. Foram avaliados, através de exame macroscópico e pesagem, ovários de fêmeas mestiças Large Withe x Landrace, descartadas de 10 granjas na microrregião de Rio Verde-GO no período de março a julho de 2002. As causas de descarte das fêmeas amostradas em sua maioria foram devido a baixa produtividade, a idade avançada e o mau escore corporal. No exame macroscópico pós-morte dos 330 pares de ovários avaliados destas fêmeas, foi observado que 46,36% estavam ciclando na fase folicular, 44,24% na fase lútea, 7,58% apresentavam cistos ovarianos e 1,82% foram classificados como em estado de anestro. O peso médio dos ovários foi de 8,75g, sendo que aqueles que possuíam cistos foram os mais pesados (31,94g) e os mais leves foram aqueles em estado anéstrico com 3,74g. Com base nestes dados observamos que 98,18% dos ovários avaliados estavam ciclando normalmente, apesar das fêmeas estarem apresentando queda na sua produção. Os resultados sugerem que não há nenhuma associação entre a diferença de peso apresentada pelos ovários direito e esquerdo, e as fases do ciclo estral. Relacionando as causas de descarte com a condição funcional dos ovários observou-se que não houve nenhuma dependência entre as duas variáveis.Palavras-chave: fêmea suína; reprodução; ovários; descarte. Intr...

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“…The mammalian uterus is a truly remarkable organ whose physiological and morphological characteristics change not only within but also between reproductive states. The majority of these changes in uterine structure and function are attributable to ovarian hormones [5]. Surface and glandular epithelia are considered to be functionally different cell populations regarding morphology and secretory activities.…”

Section: Discussionmentioning

confidence: 99%

Histological changes within ovarian cortex, oviductal and uterine mucosa in case of ovarian cysts presence in sows.

Szulańczyk

2009

Folia Histochem Cytobiol.

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Abstract:The aim of study was histological evaluation of oviduct and uterus mucosa in case of cystical ovarian degeneration in sows. Materials for evaluations were received after slaughtering of 294 sows at age of 2-5 years. Sows were eliminated breeding and culled due to reproduction disorders: anoestrus after weaning of piglets, return of estrus, small litters and due to age, number of birth, bad condition after lactation. 20 sows (6.8%) had cysts on ovaries. Histological investigations were conducted on reproductive organs of sows with ovarian cysts. Sows were divided onto two groups: 1. with polycystic ovaries (12 sows), 2. with simple cyst (8 sows) occured unilaterally (3 sows) or bilaterally (5 sows). In our studies we noted different kids of ovarian cysts and structural changes in ovarian cortex like decreasing numbers of ovarian folliculi of all generations, increasing of follicular atresia. We compared the state of oviduct and uterus mucosa in case of polycystic ovaries with the histological changes in these tissues when single cysts were present on the ovaries. The single follicular cysts aren't accompanied with important changes in reproductive system. In case of polycystic ovaries the presence of cyst is connected with occurrence of morphological changes in endothelium of oviduct and uterus which would have been a reason of persistent infertility of pigs.

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Ovarian cysts and their consequences on the reproductive performance of swine herds

Cited by 69 publications

References 10 publications

Factors of importance when selecting sows as embryo donors

Factors of importance when selecting sows as embryo donors

Aspectos Macroscópicos Dos Ovários De Matrizes Suínas, Oriundas De Granjas Da Microrregião De Rio Verde-Go E Descartadas Para Abate Por Motivos Diversos

Histological changes within ovarian cortex, oviductal and uterine mucosa in case of ovarian cysts presence in sows.

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