{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,20]],"date-time":"2026-10-20T13:05:53Z","timestamp":1792501553720,"version":"4.5.0"},"reference-count":32,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2023,8,9]],"date-time":"2023-08-09T00:00:00Z","timestamp":1691539200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001524","name":"New Zealand Equine Research Foundation","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100001524","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["beva.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Equine Veterinary Journal"],"published-print":{"date-parts":[[2024,7]]},"abstract":"Abstract<\/jats:title>\n \n Background<\/jats:title>\n Despite being a large commercial breeding industry, there is little published data on the reproductive success of Standardbred mares.<\/jats:p>\n <\/jats:sec>\n \n Objectives<\/jats:title>\n To quantify the reproductive performance of Standardbred mares under artificial breeding systems in a commercial setting and determine the incidence of early embryonic and other pre\u2010partum losses.<\/jats:p>\n <\/jats:sec>\n \n Study design<\/jats:title>\n Retrospective cohort study.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n Data from four commercial farms were collected across four breeding years, and all mares were bred via artificial insemination. A total of 3995 mares contributed 7229 mare years. First\u2010cycle pregnancy rate (FCPR) and end of season pregnancy rate (SPR) were analysed in mixed\u2010effects logistic regression models. Time\u2010to\u2010conception interval was analysed in a Cox regression model.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n The mean FCPR was 61.4% (confidence interval [CI] 60.3%\u201362.6%), the mean end of SPR was 84.7% (CI 83.8\u201385.5%), the mean live foal rate (FR) was 73.1% (CI 72.1%\u201374.2%). Mares located on\u2010farm were more probable to be pregnant in terms of both FCPR (odds ratio [OR] 1.168, CI 1.018\u20131.340,\n p<\/jats:italic>\n \u2009=\u20090.026) and SPR (OR 2.026, CI 1.673\u20132.454,\n p<\/jats:italic>\n \u2009<\u20090.001), mares inseminated with thawed\u2013frozen semen were less probable to be pregnant in terms of FCPR (OR 0.598, CI 0.457\u20130.783,\n p<\/jats:italic>\n \u2009<\u20090.001) and SPR (OR 0.479, CI 0.354\u20130.647,\n p<\/jats:italic>\n \u2009<\u20090.001) compared with insemination with fresh\u2010extended semen. Older mares (14\u2009years and older) were less probable to be pregnant in terms of FCPR (OR 0.795, CI 0.688\u20130.919,\n p<\/jats:italic>\n \u2009=\u20090.002) and SPR (0.435, CI 0.352\u20130.538,\n p<\/jats:italic>\n \u2009<\u20090.001) compared with young mares (3\u2010 to 8\u2010year old).\n <\/jats:p>\n <\/jats:sec>\n \n Main limitations<\/jats:title>\n Retrospective data relied on accurate record keeping of stud farms and no mare\u2010treatment or ovulation induction records were available. Live FRs relied mostly on annual foaling returns so fetal\/foal deaths may be underrepresented.<\/jats:p>\n <\/jats:sec>\n \n Conclusion<\/jats:title>\n This study provides substantial baseline data on reproductive performance for Standardbred mares managed under a commercial artificial breeding system.<\/jats:p>\n <\/jats:sec>","DOI":"10.1111\/evj.13989","type":"journal-article","created":{"date-parts":[[2023,8,10]],"date-time":"2023-08-10T02:02:52Z","timestamp":1691632972000},"page":"776-785","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Reproductive performance of a cohort of Standardbred mares under a commercial breeding system"],"prefix":"10.1111","volume":"56","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2502-8950","authenticated-orcid":false,"given":"Jasmine C.","family":"Tanner","sequence":"first","affiliation":[{"name":"Department of Agricultural Sciences, Faculty of Agriculture and Life Sciences Lincoln University Christchurch New Zealand"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Graham K.","family":"Barrell","sequence":"additional","affiliation":[{"name":"Department of Agricultural Sciences, Faculty of Agriculture and Life Sciences Lincoln University Christchurch New Zealand"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,8,9]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1751-0813.2010.00565.x"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1186\/1751-0147-52-40"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.2746\/042516402776181222"},{"key":"e_1_2_11_5_1","doi-asserted-by":"publisher","DOI":"10.2746\/042516407X1737581"},{"key":"e_1_2_11_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/rda.12655"},{"key":"e_1_2_11_7_1","doi-asserted-by":"publisher","DOI":"10.2746\/042516409X456068"},{"key":"e_1_2_11_8_1","doi-asserted-by":"publisher","DOI":"10.2746\/042516409X456059"},{"key":"e_1_2_11_9_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1751-0813.1993.tb07979.x"},{"key":"e_1_2_11_10_1","doi-asserted-by":"publisher","DOI":"10.1080\/00480169.2012.693039"},{"key":"e_1_2_11_11_1","doi-asserted-by":"publisher","DOI":"10.1080\/00480169.2012.696240"},{"key":"e_1_2_11_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.theriogenology.2011.10.001"},{"key":"e_1_2_11_13_1","first-page":"126","article-title":"Retrospective examination of the breeding efficiency of the New Zealand Thoroughbred and Standardbred","volume":"69","author":"Rogers CW","year":"2009","journal-title":"Proc N Z Soc Anim Prod"},{"key":"e_1_2_11_14_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1439-0531.2004.00482.x"},{"key":"e_1_2_11_15_1","doi-asserted-by":"publisher","DOI":"10.1071\/AN16728"},{"key":"e_1_2_11_16_1","volume-title":"Reproductive biology of the mare: basic and applied aspects","author":"Ginther OJ","year":"1992"},{"key":"e_1_2_11_17_1","first-page":"137","article-title":"An overview of the New Zealand Thoroughbred industry","volume":"70","author":"Fennessy PF","year":"2010","journal-title":"Proc N Z Soc Anim Prod"},{"key":"e_1_2_11_18_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.theriogenology.2010.10.027"},{"key":"e_1_2_11_19_1","first-page":"1","volume-title":"Artificial breeding of horses","author":"Taylor TB","year":"2008"},{"key":"e_1_2_11_20_1","first-page":"1","volume-title":"Anonymous Harness Racing New Zealand regulations","year":"2021"},{"key":"e_1_2_11_21_1","first-page":"360","volume-title":"Veterinary epidemiologic research","author":"Dohoo I","year":"2003"},{"key":"e_1_2_11_22_1","volume-title":"Veterinary epidemiologic research","author":"Dohoo I","year":"2003"},{"key":"e_1_2_11_23_1","doi-asserted-by":"publisher","DOI":"10.1186\/s13028-015-0161-8"},{"key":"e_1_2_11_24_1","doi-asserted-by":"publisher","DOI":"10.1016\/0093-691X(86)90168-8"},{"key":"e_1_2_11_25_1","doi-asserted-by":"publisher","DOI":"10.1071\/RD14390"},{"key":"e_1_2_11_26_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1439-0531.2009.01485.x"},{"key":"e_1_2_11_27_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.2042-3292.2006.tb00425.x"},{"key":"e_1_2_11_28_1","doi-asserted-by":"publisher","DOI":"10.1051\/rnd:2004055"},{"key":"e_1_2_11_29_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0093-691X(97)00319-1"},{"key":"e_1_2_11_30_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0196-9846(17)30167-2"},{"key":"e_1_2_11_31_1","doi-asserted-by":"publisher","DOI":"10.1080\/00480169.2011.632340"},{"key":"e_1_2_11_32_1","article-title":"What is \u201cnormal\u201d foaling?","volume":"16","author":"Evans MJ","year":"2010","journal-title":"Found Bull"},{"key":"e_1_2_11_33_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0378-4320(02)00171-9"}],"container-title":["Equine Veterinary Journal"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/beva.onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/evj.13989","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,11,2]],"date-time":"2025-11-02T08:20:51Z","timestamp":1762071651000},"score":1,"resource":{"primary":{"URL":"https:\/\/beva.onlinelibrary.wiley.com\/doi\/10.1111\/evj.13989"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,8,9]]},"references-count":32,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2024,7]]}},"alternative-id":["10.1111\/evj.13989"],"URL":"https:\/\/doi.org\/10.1111\/evj.13989","archive":["Portico"],"relation":{"has-review":[{"id-type":"doi","id":"10.1111\/EVJ.13989\/v2\/decision1","asserted-by":"object"},{"id-type":"doi","id":"10.1111\/EVJ.13989\/v3\/response1","asserted-by":"object"},{"id-type":"doi","id":"10.1111\/EVJ.13989\/v2\/review1","asserted-by":"object"},{"id-type":"doi","id":"10.1111\/EVJ.13989\/v1\/decision1","asserted-by":"object"},{"id-type":"doi","id":"10.1111\/EVJ.13989\/v2\/review2","asserted-by":"object"},{"id-type":"doi","id":"10.1111\/EVJ.13989\/v2\/response1","asserted-by":"object"},{"id-type":"doi","id":"10.1111\/EVJ.13989\/v1\/review1","asserted-by":"object"},{"id-type":"doi","id":"10.1111\/EVJ.13989\/v3\/decision1","asserted-by":"object"},{"id-type":"doi","id":"10.1111\/EVJ.13989\/v1\/review2","asserted-by":"object"}]},"ISSN":["0425-1644","2042-3306"],"issn-type":[{"value":"0425-1644","type":"print"},{"value":"2042-3306","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,8,9]]},"assertion":[{"value":"2022-07-19","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2023-07-27","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2023-08-09","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}