Restablecimiento de la actividad reproductiva posparto en ovejas de pelo

Castillo-Maldonado, P.P.; Vaquera-Huerta, Humberto; Tarango-Arámbula, Luis A.; Pérez-Hernández, Ponciano; Herrera-Corredor, Alejandra; Gallegos‐Sánchez, Jaime

doi:10.4321/s0004-05922013000300010

Cited by 4 publications

(6 citation statements)

References 8 publications

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“…It has been shown that hair ewes respond satisfactorily to the ovulation induction protocols before 60 days postpartum (Morales-Terán et al, 2011). This information is similar to that reported by Castillo-Maldonado et al (2013) who showed that ewes restart their postpartum reproductive activity around day 35 after lambing. Likewise, in this study, ovulation induction in hair ewes was performed on average on postpartum day 25, with the aim of performing artificial insemination on approximately postpartum day 35.…”

Section: Resultssupporting

confidence: 91%

“…In addition, it was observed that ewes responded to the ovulation induction protocol, as all ewes showed signs of estrus after CIDR withdrawal. It has also been shown that decreasing the contact of the lamb with its mother positively increases the response to ovulation induction protocols; that is, females with suckling control reestablish ovarian activity sooner than females with continuous suckling after lambing (Morales-Terán et al, 2011;Castillo-Maldonado et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

“…Also, it has been shown that suckling control during lactation can decrease or inhibit the negative effects that the negative energy balance and continued suckling often have on follicular development and ovulation after lambing (Fray et al, 1995;Scaramuzzi et al, 1996;Abu Ishmais et al, 2004;Morales-Terán et al, 2004;Pérez-Hernández et al, 2009;Castillo-Maldonado et al, 2013). Therefore, the objective of the present study was to evaluate the effect of suckling control and by pass fat on the restoration of postpartum ovarian activity in hair ewes.…”

Section: Introductionmentioning

confidence: 93%

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Suckling and Excess Fat in the Postpartum Reproductive Activity of Hair Sheep

Osorio-Marín

Torres-Hernández

Becerril-Pérez

et al. 2021

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Objective: To evaluate the effect of excess fat and suckling control on postpartum reproductive activity of hair ewes. Design/Methodology/Approach: Eighty-one (81) hair ewes with average weight of 58±8 kg were used, which on postpartum day 7 were assigned to one of four treatments under a completely randomized design with 2×2 factorial arrangement. Factor A is the type of suckling [continuous suckling (CS) and suckling control (SC)] and factor B, excess fat (with or without). In CS, ewes remained with their offspring 24 hours a day (n=16). In continuous suckling plus fat (CSF), ewes remained with the offspring all day plus the addition of 8% in dietary fat (n=24). In SC, it was 30 min of suckling only twice per day (n=14). In suckling control plus fat (SCF), controlled suckling lasted 30 min, twice a day plus 8% fat (n=25). Results: The response to the treatments was similar (p > 0.05) in onset of estrus, return rate, gestation, prolificacy and fertilization; for the lambing rate variable, there were differences (p ≤ 0.05), the SCF treatment was higher (68%) compared to CS (50%) and CSF (50%), but equal (p < 0.05) to SC (57.1%). Implications: In this experiment, it was observed that the SCF treatment presented a better response, implying that controlling suckling and providing excess fat helps to restore ovarian activity sooner after lambing. Conclusions: Suckling control plus inclusion of dietary excess fat in ovulation induction protocols during early postpartum (around day 25 postpartum) can be included in routine reproductive management of flocks, improving the reproductive efficiency of hair sheep.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 93%

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Suckling and Excess Fat in the Postpartum Reproductive Activity of Hair Sheep

Osorio-Marín

Torres-Hernández

Becerril-Pérez

et al. 2021

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“…Controlled suckling does not affect the weight gain of the lambs compared to continuous suckling when creep-feeding and basic cares of the lambs are offered (Morales-Terán et al, 2011). In addition, this management of ewes and lambs decreases the levels of stress that happen at the moment of weaning in mothers and lambs observed in continuous suckling, and the weight gain from birth to 41 days of age of the lambs is similar in controlled suckling and continuous suckling (Castillo-Maldonado et al, 2013), when their diet depends most on the milk consumed from their mothers (Pérez-Hernández et al, 2009).…”

Section: Reduction Of the Postpartum Anestrus With Controlled Sucklingmentioning

confidence: 99%

Suckling, male effect and kisspeptin in the reproductive management of ewes in postpartum anestrus

Gallegos‐Sánchez¹,

Becerril-Pérez²,

Pró-Martínez³

et al. 2021

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Objective: To describe the management strategies of controlled suckling and the male effect to reduce postpartum anestrus, and to show the participation of kisspeptin to regulate the effect of both factors. Design/Methodology/Approach: A review of scientific publications was conducted, in order to show the importance of suckling and the male effect as strategies to reduce postpartum anestrus in the ewe, as well as the relation of kisspeptin with both factors. Results: Seasonal anestrus can be avoided with the use of breeds adapted to the local environment, such as Pelibuey. Postpartum anestrus occurs mainly as a result of suckling, since the latter inhibits the pulsating secretion of the gonadotropin-releasing hormone (GnRH) and the luteinizing hormone (LH). The exact path of this inhibition is unknown, although it seems that endogenous opioid peptides and kisspeptin are intermediaries. Controlled suckling and the male effect are management strategies that improve the reproductive behavior of postpartum ewes. Kisspeptin regulates the influence of the male effect through the secretion of GnRH/LH. Study Limitations/Implications: To understand the impacts of suckling and the male effect on the duration of postpartum anestrus, as well as the participation of kisspeptin in the regulation of both effects, will allow designing management strategies to improve the reproductive efficiency of the ewes. Findings/Conclusions: Controlled suckling and the male effect reduce postpartum anestrus and improve the reproductive behavior of the ewes; advancing knowledge of the kisspeptin effect could improve the effectiveness of both techniques.

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“…Durante la temporada de empadre, las borregas se encuentran usualmente destetadas de sus corderos y, por lo tanto, han cesado la producción de leche, estando en la condición fisiológica de seca y vacía; sin embargo, esto no siempre sucede, lo cual afecta las campañas de inseminación artificial convencional, principalmente a nivel de rebaños de pequeños productores, dado que la lactación interfiere con el reinicio de la actividad ovárica (Castillo et al, 2013). Ante esto, es necesario buscar alternativas al tratamiento hormonal como posibles estrategias complementarias, tal como el destete tempo-ral de corderos, para viabilizar protocolos de sincronización de estro y ovulación en borregas lactantes, buscando una mayor eficiencia reproductiva.…”

Section: Introductionunclassified

Evaluación de un protocolo de sincronización de estro en ovejas con destete temporal para inseminación artificial a tiempo fijo

Molina

Reyes

Huaroco

et al. 2020

Rev. investig. vet. Perú

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La investigación tuvo como objetivo evaluar un protocolo de inducción de celo en borregas lactantes con tratamiento hormonal de progestágenos y eCG con destete temporal de corderos para inseminación artificial a tiempo fijo por vía transcervical con semen refrigerado sobre la presentación de celo, preñez y natalidad. Se trabajó con 37 borregas distribuidas entre tres tratamientos: T1, borregas con destete temporal de la cría (n=15); T2, borregas con cría sin destete (n=10); T3, borregas en seca y sin cría (n=12). El destete temporal fue por 48 h previos a la inseminación. T1 y T3 presentaron una mayor tasa de celo manifiesto (100 y 91.66%, respectivamente) que T2 (60%; p<0.05). La tasa de no retorno de celo a los 14-17 días pos-servicio fue estadísticamente similar entre grupos (93.33, 60.0, 91.66% para T1, T2 y T3, respectivamente). En forma similar, el porcentaje de preñez por ecografía a los 45 días y el porcentaje de natalidad tuvieron los mismos valores y fueron estadísticamente similares (93.33, 60.0 y 66.67 y para T1, T2 y T3, respectivamente).

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Restablecimiento de la actividad reproductiva posparto en ovejas de pelo

Cited by 4 publications

References 8 publications

Suckling and Excess Fat in the Postpartum Reproductive Activity of Hair Sheep

Suckling and Excess Fat in the Postpartum Reproductive Activity of Hair Sheep

Suckling, male effect and kisspeptin in the reproductive management of ewes in postpartum anestrus

Evaluación de un protocolo de sincronización de estro en ovejas con destete temporal para inseminación artificial a tiempo fijo

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