Reproduction in Domestic Animals最新文献

Extended lactations in dairy cows and the effects on fertility and production. 奶牛泌乳期延长及其对繁殖力和产量的影响。

IF 1.6 3区农林科学

Reproduction in Domestic Animals Pub Date : 2024-09-01 DOI: 10.1111/rda.14690

Ariette T M van Knegsel, Eline E A Burgers, Anna Edvardsson Rasmussen

{"title":"Extended lactations in dairy cows and the effects on fertility and production.","authors":"Ariette T M van Knegsel, Eline E A Burgers, Anna Edvardsson Rasmussen","doi":"10.1111/rda.14690","DOIUrl":"https://doi.org/10.1111/rda.14690","url":null,"abstract":"Extending lactation length reduces the frequency of critical calving events for the cow and herewith reduces the frequency of periods with increased risk for health problems. Moreover, breeding is postponed until a moment later in lactation, which is associated with better conception rates and less days open after start of the breeding period in most studies. Potential risks of an extended lactation are that milk yield of cows at the end of the lactation may be too low which may lead to cows being overconditioned at the end of the extended lactation. Therefore, extending lactation length might not fit every cow. Individual cow characteristics like parity, milk yield level, or body condition determine the response of the cow to an extended lactation. These individual cow characteristics can be used in customized management strategies to optimize lactation length for individual cows. Customized lactation length for individual cows could limit the impact at herd level of disadvantages concerning milk losses and overconditioning and maintain benefits for improved cow health and fertility, reduced number of surplus calves and increased work satisfaction for the farmer. In conclusion, extending lactation length has interesting perspectives for health and fertility of high-producing dairy cows, although questions remain concerning management approaches to support lactation persistency of cows with an extended lactation, and consequences for calf health and development. Moreover, ongoing studies aim to develop decision support tools to select individual cows for a specific lactation length.","PeriodicalId":21035,"journal":{"name":"Reproduction in Domestic Animals","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142133551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimisation of Early Pregnancy Diagnosis and Resynchronisation in Beef Cows. 优化肉牛的早期妊娠诊断和再同步化。

IF 1.6 3区农林科学

Reproduction in Domestic Animals Pub Date : 2024-09-01 DOI: 10.1111/rda.14719

Audrey Bagon, Luiz Gustavo Bruno Siqueira, João Henrique Moreira Viana, Luiz Francisco Machado Pfeifer

{"title":"Optimisation of Early Pregnancy Diagnosis and Resynchronisation in Beef Cows.","authors":"Audrey Bagon, Luiz Gustavo Bruno Siqueira, João Henrique Moreira Viana, Luiz Francisco Machado Pfeifer","doi":"10.1111/rda.14719","DOIUrl":"https://doi.org/10.1111/rda.14719","url":null,"abstract":"The objectives of this study were (1) to investigate the effects of the preovulatory follicle (POF) size on the accuracy of Doppler-based early pregnancy detection, and (2) to determine whether the removal of PGF2α (PGF) treatment during the resynchronisation protocol would affect fertility in beef cows. In Experiment 1, Nelore suckling cows (n = 224) were enrolled in an estradiol-progesterone-based timed artificial insemination (TAI) protocol. At TAI, cows were separated based on the range of POF diameters, as follows: ≤11.0 mm (n = 50), 11.1-12.9 mm (n = 64), 13.0-14.4 mm (n = 62) and ≥14.5 mm (n = 48). On day 22 after TAI, the corpus luteum (CL) blood flow (CLBF) of all cows was examined by colour Doppler ultrasonography to diagnose nonpregnant cows. The cows with the largest POF had the greatest positive predictive value (88.6%; 31 of 35) and diagnostic accuracy (91.7%; 44 of 48). In Experiment 2, Nelore cows (n = 233) were subjected to the same TAI protocol. Fourteen days after TAI, all cows were started on a resynchronisation protocol. Cows diagnosed as nonpregnant based on CLBF, on day 22, received 0.5 mg estradiol cypionate intramuscular (im) and were assigned to receive either 150 μg of PGF (PGF; n = 50) or 2 mL of saline (control; n = 47). Cows treated with PGF had a P/AI of 30.0% compared with a 48.9% P/AI in controls (p = 0.06). Our findings demonstrate that the POF size affects the accuracy of a CLBF-based early pregnancy diagnosis and that the removal of PGF treatment from the resynchronisation protocol tended to increase P/AI of the second TAI.","PeriodicalId":21035,"journal":{"name":"Reproduction in Domestic Animals","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142154894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Special Issue: Proceedings of the 27th Annual Conference of the European Society for Domestic Animal Reproduction (ESDAR), 12-14 September 2024, Belgrade, Serbia. 特刊：欧洲家畜繁殖学会（ESDAR）第 27 届年会论文集，2024 年 9 月 12-14 日，塞尔维亚贝尔格莱德。

IF 1.6 3区农林科学

Reproduction in Domestic Animals Pub Date : 2024-09-01 DOI: 10.1111/rda.14684

引用次数: 0

Special Issue: Proceedings of the 27th Annual Conference of the European Society for Domestic Animal Reproduction (ESDAR), 12-14 September 2024, Belgrade, Serbia. 特刊：欧洲家畜繁殖学会（ESDAR）第 27 届年会论文集，2024 年 9 月 12-14 日，塞尔维亚贝尔格莱德。

IF 1.6 3区农林科学

Reproduction in Domestic Animals Pub Date : 2024-09-01 DOI: 10.1111/rda.14682

引用次数: 0

Trends and challenges in liquid-preserved boar semen production: From boar to product. 液体保存公猪精液生产的趋势与挑战：从公猪到产品

IF 1.6 3区农林科学

Reproduction in Domestic Animals Pub Date : 2024-09-01 DOI: 10.1111/rda.14590

Martin Schulze, Sophie Henneberg, Anine Riedel, Britta Hensel

引用次数: 0

Contraceptive effect of a gonadotropin-releasing hormone vaccine on captive male brown bears (Ursus arctos). 促性腺激素释放激素疫苗对圈养雄性棕熊（Ursus arctos）的避孕效果。

IF 1.6 3区农林科学

Reproduction in Domestic Animals Pub Date : 2024-09-01 DOI: 10.1111/rda.14707

Naoya Matsumoto, Jumpei Tomiyasu, Kyogo Hagino, Motozumi Matsui, Yojiro Yanagawa

{"title":"Contraceptive effect of a gonadotropin-releasing hormone vaccine on captive male brown bears (Ursus arctos).","authors":"Naoya Matsumoto, Jumpei Tomiyasu, Kyogo Hagino, Motozumi Matsui, Yojiro Yanagawa","doi":"10.1111/rda.14707","DOIUrl":"10.1111/rda.14707","url":null,"abstract":"Fertility control has traditionally been applied in zoos to control captive populations, and reversible contraception is important. However, contraceptive methods for male bears have not been reported. We aimed to establish a reversible contraceptive for male brown bears by investigating the effects of a gonadotropin-releasing hormone (GnRH) vaccine (Improvac®) that was developed for the immune castration of pigs. We vaccinated six bears with two sequential doses of 400 (n = 2) or 600 μg Improvac® (n = 4) with a 1-month interval during the pre-breeding season (February to April). We compared the reproductive parameters (testosterone levels and semen parameters) of the six vaccinated and four non-vaccinated (control) bears once during the breeding season (May or June). To investigate whether the reproductive performance could be restored in the following year of contraception, we also compared the reproductive parameters once during the breeding season in two bears between the year with GnRH vaccination and the following year without vaccination. Vaccination treatments suppressed reproductive parameters in 5 bears, although vaccination with 400 μg of Improvac® was not effective in one bear. Testosterone levels and the rate of progressive sperm motility were significantly lower, and total sperm count and testis size tended to be lower in vaccinated bears, compared with the controls. Blood biochemical findings and direct observations after Improvac® vaccination did not reveal side effects. Moreover, testosterone levels and spermatogenic scores of two bears were restored in the following year. We confirmed that the Improvac® vaccine elicited a reversible contraceptive effect in male brown bears.","PeriodicalId":21035,"journal":{"name":"Reproduction in Domestic Animals","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142111380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Special Issue: Proceedings of the 27th Annual Conference of the European Society for Domestic Animal Reproduction (ESDAR), 12-14 September 2024, Belgrade, Serbia. 特刊：欧洲家畜繁殖学会（ESDAR）第 27 届年会论文集，2024 年 9 月 12-14 日，塞尔维亚贝尔格莱德。

IF 1.6 3区农林科学

Reproduction in Domestic Animals Pub Date : 2024-09-01 DOI: 10.1111/rda.14683

引用次数: 0

Impact of Periconceptional and Gestational Vitamin D3 Restriction on Fetal Folliculogenesis and Anti-Mullerian Hormone Secretion Using Sheep as a Model. 以绵羊为模型研究围孕期和妊娠期维生素 D3 限制对胎儿蓇葖果生成和抗苗勒氏管激素分泌的影响

IF 1.6 3区农林科学

Reproduction in Domestic Animals Pub Date : 2024-09-01 DOI: 10.1111/rda.14717

E C Mbegbu, M Salavati, L O Aka, I R Obidike, J C Y Tang, W D Fraser, M A Hanson, L R Green, A A Fouladi-Nashta

{"title":"Impact of Periconceptional and Gestational Vitamin D3 Restriction on Fetal Folliculogenesis and Anti-Mullerian Hormone Secretion Using Sheep as a Model.","authors":"E C Mbegbu, M Salavati, L O Aka, I R Obidike, J C Y Tang, W D Fraser, M A Hanson, L R Green, A A Fouladi-Nashta","doi":"10.1111/rda.14717","DOIUrl":"https://doi.org/10.1111/rda.14717","url":null,"abstract":"Ovarian reserve is a reflection of the overall female reproductive potential. Vitamin D status has been suspected to influence fetal development and female fertility. As maternal diet during pregnancy can affect fetal development and future fertility, we hypothesised that periconceptional and gestational Vitamin D restriction could affect folliculogenesis and AMH secretion in the offspring. Nineteen sexually mature Welsh mountain ewes were randomly assigned to Vitamin D3 deficient (VDD, n = 10) and Vitamin D3 control (VDC, n = 9) diets from 17 days (d) before mating, up to 127-130 days of gestation, when fetal ovaries were collected (3 from VDC and 6 from VDD). Serum 25(OH)D3 concentrations were lower in VDD compared with VDC (p < 0.05). Relative to total follicle number, the percentage of primordial follicles was higher (p < 0.05), while the percentage of primary follicles was lower (p < 0.05) in VDD group compared with VDC group fetal ovaries. The integrated density value and percentage of affected area in TUNEL staining in VDD group did not vary from VDC group fetal ovaries (p > 0.05). Relative expression of AMH mRNA and AMH protein in VDD fetal ovaries were not statistically different compared with controls (p > 0.05). The relative expression of VDR mRNA were lower in VDD compared with VDC group fetal ovaries (p < 0.05). These data indicate that maternal Vitamin D dietary restriction is associated with ovarian tissue stemness and increased primordial follicle number but does not promote normal follicle recruitment or development in sheep fetal ovaries.","PeriodicalId":21035,"journal":{"name":"Reproduction in Domestic Animals","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142133548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genetic and Phenotypic Trends for Production and Reproduction Traits in Murrah Buffaloes. 穆拉水牛生产和繁殖性状的遗传和表型趋势。

IF 1.6 3区农林科学

Reproduction in Domestic Animals Pub Date : 2024-09-01 DOI: 10.1111/rda.14712

Rohit Sharma, Satpal Dahiya, Yogesh Chandrakant Bangar, Renuka Hada, Dipin Chander Yadav

{"title":"Genetic and Phenotypic Trends for Production and Reproduction Traits in Murrah Buffaloes.","authors":"Rohit Sharma, Satpal Dahiya, Yogesh Chandrakant Bangar, Renuka Hada, Dipin Chander Yadav","doi":"10.1111/rda.14712","DOIUrl":"https://doi.org/10.1111/rda.14712","url":null,"abstract":"The objective of the study was to estimate genetic and phenotypic trends for first lactation production and reproduction traits in Murrah buffaloes. The information of pedigree and targeted traits of 640 Murrah buffaloes was collected for the period from 1997 to 2020. The first lactation production traits included first lactation milk yield (FLMY), 305 days first lactation milk yield (305FLMY), first lactation length (FLL), first lactation peak yield (FPY) whereas reproduction traits included first service period (FSP), first calving interval (FCI) and first dry period (FDP). Genetic and phenotypic trends were estimated. Phenotypic trends for FLMY, 305FLMY, FLL and FPY exhibited as 36.96 ± 8.58 kg/year, 31.93 ± 8.34 kg/year, 1.47 ± 0.55 days/year and 0.12 ± 0.02 kg/year, respectively and respective genetic trends exhibited as 3.73 ± 1.67 kg/year, 1.94 ± 0.76 kg/year, -0.15 ± 0.07 days/year and 0.01 ± 0.01 kg/year, respectively. It was revealed that there were significant (p < 0.05) and positive phenotypic trends for all production traits while genetic trends were significant (p < 0.05) for FLMY and 305FLMY traits. The phenotypic trends of studied reproductive traits indicated that only FDP trait significantly (p < 0.01) decreased (1.87 days/year) over time. For FSP and FCI traits, nonsignificant (p > 0.05) genetic and phenotypic trends indicated no change over time. This study highlighted potential challenges in maintaining reproductive efficiency alongside productivity improvements in Murrah buffaloes.","PeriodicalId":21035,"journal":{"name":"Reproduction in Domestic Animals","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142111381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Equine ART and antral follicle count: Can we deepen our understanding to improve outcomes? 马 ART 和前卵泡计数：我们能否加深理解以改善结果？

IF 1.6 3区农林科学

Reproduction in Domestic Animals Pub Date : 2024-09-01 DOI: 10.1111/rda.14625

Aurore Le Breton, Niamh Lewis

{"title":"Equine ART and antral follicle count: Can we deepen our understanding to improve outcomes?","authors":"Aurore Le Breton, Niamh Lewis","doi":"10.1111/rda.14625","DOIUrl":"https://doi.org/10.1111/rda.14625","url":null,"abstract":"Assisted reproductive technologies (ARTs) are performed worldwide in the equine industry to produce genetically valuable foals. Among them, ovum pick up (OPU) combined with intra-cytoplasmic sperm injection (ICSI) can now be more efficient than embryo transfer (ET) under optimal conditions. However, OPU is not a benign procedure for the mare and the process is costly. Improved efficiency is therefore in the interest of everyone, maximizing mare welfare and optimizing economics for the client. One of the key factors of success is the antral follicle count (AFC) at the time of OPU and subsequently the number of oocytes obtained. Variations in AFC are reported between individuals and between geographical areas. This leads to a significant increase in numbers of embryos produced per session in some countries compared to others, independent of the laboratory efficiency. This article revisits the basics of folliculogenesis involved in establishment of the antral follicle population and explores work in other species given the paucity of equine research in this area. The aim of the review is to elucidate interesting areas of further research that could generate essential information for clinicians and clients about the management and selection of the donor mare for OPU and potentially identify pharmacological targets for manipulation.","PeriodicalId":21035,"journal":{"name":"Reproduction in Domestic Animals","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142133550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0