{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,25]],"date-time":"2025-09-25T16:26:29Z","timestamp":1758817589002},"reference-count":29,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2018,3,25]],"date-time":"2018-03-25T00:00:00Z","timestamp":1521936000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100008349","name":"Boehringer Ingelheim","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100008349","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Aust Veterinary J"],"published-print":{"date-parts":[[2018,4]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>To describe reproductive performance of lactating dairy cows after fixed\u2010time artificial insemination (FTAI) with ovulation synchronisation and re\u2010synchrony in Australian dairy herds, and to compare reproductive outcomes with those of conventional mating programs.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The study was conducted in two seasonally calving dairy herds in which lactating dairy cows (n\u2009=\u2009675) were enrolled into three treatment groups: group 1, oestrus detection and AI for 34\u2009days followed by a natural service period; group 2, FTAI on day 1 followed by re\u2010synchrony of all cows prior to ultrasound pregnancy diagnosis at day 31 and FTAI of cows diagnosed not pregnant at day 34, then a natural service period; group 3, FTAI on day 1 followed by oestrus detection and AI for 34\u2009days, then a natural service period. First\u2010service conception rate (FSCR), 6\u2010week in\u2010calf (6WIC) rate and proportions pregnant at the end of mating were compared using logistic regression with farm fitted as a fixed effect. Times from mating start date to conception were described using survival analysis with Kaplan\u2010Meier failure functions.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>FSCRs (45.3%, 49.1% and 45.6% for groups 1, 2 and 3, respectively) and proportions pregnant at the end of mating (77.6%, 76.0% and 76.8% for groups 1, 2 and 3, respectively) were similar for all groups. The 6WIC rate in group 2 was similar to that in group 3 (70.4% vs. 67.2%; P\u2009=\u20090.486), but tended to be higher than in group 1 (70.4% vs. 62.0%, P\u2009=\u20090.066). The median days to pregnancy for cows that conceived was 1\u2009day in groups 2 and 3 and 10\u2009days in group 1.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Mating plans that use FTAI with ovulation synchronisation and re\u2010synchrony during the AI period can achieve comparable reproductive performance to conventional mating programs in seasonally calving dairy herds.<\/jats:p><\/jats:sec>","DOI":"10.1111\/avj.12682","type":"journal-article","created":{"date-parts":[[2018,4,5]],"date-time":"2018-04-05T23:43:23Z","timestamp":1522971803000},"page":"111-119","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Reproductive performance of cows after fixed\u2010time artificial insemination with ovulation synchronisation and re\u2010synchrony in southern Australian dairy herds"],"prefix":"10.1111","volume":"96","author":[{"given":"MM","family":"Izzo","sequence":"first","affiliation":[{"name":"The Vet Group  Allansford Victoria Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M","family":"Humphris","sequence":"additional","affiliation":[{"name":"The Milk Road  Newry Victoria Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"L","family":"Pryor","sequence":"additional","affiliation":[{"name":"Boehringer Ingelheim  North Ryde New South Wales Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A","family":"Perry","sequence":"additional","affiliation":[{"name":"Kyabram Veterinary Clinic  Kyabram Victoria Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"JM","family":"Morton","sequence":"additional","affiliation":[{"name":"Jemora Pty Ltd  Geelong Victoria Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2018,3,25]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.theriogenology.2010.02.016"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1439-0531.2007.00906.x"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1017\/S175173110800236X"},{"key":"e_1_2_8_5_1","first-page":"772","article-title":"review of current timed\u2010AI (TAI) programs for beef and dairy cattle","volume":"55","author":"Colazo MG","year":"2014","journal-title":"Can Vet J"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.3168\/jds.2008-1704"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.3168\/jds.S0022-0302(06)72280-9"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0093-691X(03)00117-1"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.3168\/jds.S0022-0302(03)74003-X"},{"key":"e_1_2_8_10_1","first-page":"228","article-title":"A guide to scoring dairy cow condition","author":"Earle DF","year":"1976","journal-title":"J Agric (Vic)"},{"key":"e_1_2_8_11_1","volume-title":"Evaluating and reporting bull fertility","author":"Entwistle K","year":"2003"},{"key":"e_1_2_8_12_1","unstructured":"Dairy Australia.Australian dairy in focus 2014. 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