Short-term dietary protein supplementation improves reproductive performance of estrous-synchronized ewes when there are long intervals of prostaglandin or progesterone-based treatments for timed AI

Olivera-Muzante, J.; Fierro, S.; Alabart, J. L.; Claramunt, M.; Minteguiaga, M.A.; Aunchayna, G.; Errandonea, N.; Banchero, Georgget

doi:10.1016/j.anireprosci.2019.05.011

Cited by 7 publications

(4 citation statements)

References 29 publications

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“…They have advantages including fast metabolism through the lungs, less residue, and low risk of potential environmental pollution ( 20 , 21 ). They were usually used by intramuscular injection to induce synchronized estrus in the breeding season ( 22 , 23 ). PG only is used when the ewes are in the estrus cycle because they can dissolve the corpus luteum in the luteal phase of the estrus cycle.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Five Protocols of Estrous Synchronization on Reproductive Performance of Hu Sheep

Bai

Yang

et al. 2022

Front. Vet. Sci.

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The purpose of this study is to compare five protocols of estrous synchronization for Hu ewes to obtain the most effective and economical protocol, to apply the advantageous scheme in large-scale sheep farming. Healthy multiparous Hu ewes (n = 150) were randomly divided into five groups, and all ewes were administered fluorogestone acetate (FGA, 45 mg) vaginal sponge. The sponges of the first three groups (Groups I, II, and III) were removed on the 11th day, and 0.1 mg of PGF2α was injected intramuscularly on the ninth day. Group I received 6 μg of gonadotropin-releasing hormone (GnRH) by intramuscular injection at 36th h after withdrawal of the sponge. Group II was injected 330 IU of pregnant mare serum gonadotropin (PMSG) on the ninth day. The combination of 6 μg of GnRH and 330 IU of PMSG was treated in Group III at the same time as Group I and Group II. The sponges of the latter two groups (Groups IV and V) were removed on the 13th day, and 330 IU of PMSG was injected intramuscularly simultaneously. PGF2α (0.1 mg) was administered on the 12th day in Group IV. All ewes were detected for estrus at 24, 36, 48, 60, and 72 h after the sponge removal. The loss of sponge and vaginitis was recorded when the sponge was withdrawn. Cervical artificial insemination (AI) was performed with fresh semen of Dorper rams diluted with skimmed milk. After 30 days of insemination, the conception was detected with a veterinary B-ultrasound scanner. The lambing status of all ewes and the cost of drugs for estrous synchronization in each group were recorded. The results showed the following: (1) on the whole, the average percentage of estrous ewes in the period of 24–36 h and 36–48 h after removal was significantly higher than other three periods and that of the period of 60–72 h was significantly lower than the first three periods after removal; (2) there was no significant difference in percentages of estrous ewes in any of the five time periods, sponge loss rate, vaginitis rate, total percentage of estrous ewes, conception rate, single lambing rate, twinning rate, and multiple lambing rate of ewes among five protocols; (3) total percentage of estrous ewes and conception rate were more than or equal to 80% in the Groups II and III, and the twinning lamb rate of the Group II protocol was 70%; (4) there was no difference in lambing rate of ewes among Groups II, III, IV, and V; (5) the Group III had the highest drug cost of 22.5 CNY. In conclusion, considering the lambing rate, twinning lamb rate, and drug cost for estrous synchronization, Group II was the most advisable for application and promotion in large-scale sheep farms among these five protocols of estrus synchronization.

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Section: Introductionmentioning

confidence: 99%

Comparison of Five Protocols of Estrous Synchronization on Reproductive Performance of Hu Sheep

Bai

Yang

et al. 2022

Front. Vet. Sci.

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“…The use of exogenous hormone protocols to synchronise the timing of oestrus and ovulation, and increase progesterone production in recipients, is essential for the success of ET programs with various combinations of exogenous gonadotrophins used to stimulate follicle growth and ovulation (reviewed by Abecia, Forcada and Gonzalez-Bulnes [18]). The combination of hormones used, the timing and duration of treatment with these hormones, and the doses used, can all vary within a stimulation or synchronisation protocol [20][21][22][23]. Furthermore, the type of intravaginal device [24], as well as the origin of the hormone (synthetic or animal or human derived) [25], can vary.…”

Section: Assisted Reproductive Technologiesmentioning

confidence: 99%

Towards Improving the Outcomes of Assisted Reproductive Technologies of Cattle and Sheep, with Particular Focus on Recipient Management

Daly

Smith

McGrice

et al. 2020

Animals

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The Australian agricultural industry contributes AUD 47 billion to the Australian economy, and Australia is the world’s largest exporter of sheep meat and the third largest for beef. Within Australia, sheep meat consumption continues to rise, with beef consumption being amongst the highest in the world; therefore, efficient strategies to increase herd/flock size are integral to the success of these industries. Reproductive management is crucial to increasing the efficiency of Australian breeding programs. The use of assisted reproductive technologies (ARTs) has the potential to increase efficiency significantly. The implementation of multiple ovulation and embryo transfer (MOET) and juvenile in vitro fertilization and embryo transfer (JIVET) in combination with genomic selection and natural mating and AI is the most efficient way to increase genetic gain, and thus increase reproductive efficiency within the Australian livestock industries. However, ARTs are costly, and high variation, particularly between embryo transfer recipients in their ability to maintain pregnancy, is a significant constraint to the widespread commercial adoption of ARTs. The use of a phenotypic marker for the selection of recipients, as well as the better management of recipient animals, may be an efficient and cost-effective means to increase the productivity of the Australian livestock industry.

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“…Ovulation and implantation are also processes that resemble pro-inflammatory reactions ( Cavalieri et al, 1998 ). PGE2 and PGF2 alpha play critical roles in endometrial vascular permeability, leukocyte recruitment during implantation, stromal decidualization, and, most importantly, blastocyst growth and development ( Fu et al, 2020 , Olivera-Muzante et al, 2019 ). COX-derived PGs are vital for successful implantation ( Andrabi and Maxwell, 2007 , Salleh, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Effect of indomethacin on embryo implantation and histomorphology of uterus, ovary, kidney, and liver of rats

Amir,

Yimer,

Hiew

et al. 2023

Saudi Journal of Biological Sciences

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Short-term dietary protein supplementation improves reproductive performance of estrous-synchronized ewes when there are long intervals of prostaglandin or progesterone-based treatments for timed AI

Cited by 7 publications

References 29 publications

Comparison of Five Protocols of Estrous Synchronization on Reproductive Performance of Hu Sheep

Comparison of Five Protocols of Estrous Synchronization on Reproductive Performance of Hu Sheep

Towards Improving the Outcomes of Assisted Reproductive Technologies of Cattle and Sheep, with Particular Focus on Recipient Management

Effect of indomethacin on embryo implantation and histomorphology of uterus, ovary, kidney, and liver of rats

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