{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:34:31Z","timestamp":1760146471683,"version":"build-2065373602"},"reference-count":31,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2024,11,8]],"date-time":"2024-11-08T00:00:00Z","timestamp":1731024000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Veterinary Sciences"],"abstract":"<jats:p>This study investigated the factors influencing gestation length in a herd of Wagyu cattle in Rio Grande do Sul, Brazil. Fifty-five multiparous purebred Wagyu cows underwent a Fixed-Time Artificial Insemination (FTAI) protocol using semen from a bull randomly selected from five bulls representing three distinct genetic lines. Following birth, we recorded the calves\u2019 gender, weight, and gestation length. The ANOVA test was employed to assess genetic effects on calf weight and gestation length, with significance set at p &lt; 0.05. The 55 inseminations resulted in 52 births, comprising 34 females and 18 males. The average calf weight was 25.9 kg, with 25.2 kg for females and 27.2 kg for males (p = 0.38). No significant effect was observed for birth weight concerning the sire\u2019s genetic line (p = 0.42), although there was a trend towards an effect from the maternal grandfather (p = 0.09). The mean duration of pregnancy was 283.8 \u00b1 5.91 days, with no significant effect of gender on gestation length (p = 0.6). However, when evaluating the genetic influences on gestation length, we observed significant effects from the sire\u2019s genetic line (p &lt; 0.0001) and the maternal grandfather (p &lt; 0.0001). Notably, longer pregnancies resulted in heavier calves (p &lt; 0.0001). This is the first study to identify the effects of Wagyu breed lines on pregnancy length.<\/jats:p>","DOI":"10.3390\/vetsci11110551","type":"journal-article","created":{"date-parts":[[2024,11,8]],"date-time":"2024-11-08T06:05:41Z","timestamp":1731045941000},"page":"551","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The Sire Effect on Gestational Length in Wagyu Cattle"],"prefix":"10.3390","volume":"11","author":[{"given":"Janine","family":"de Camargo","sequence":"first","affiliation":[{"name":"ESAN\u2014Veterinary Course, Universidade de Passo Fundo, Passo Fundo 99052-900, RS, Brazil"},{"name":"ESAN\u2014Programa de P\u00f3s Gradua\u00e7\u00e3o em Bioexperimenta\u00e7\u00e3o, Universidade de Passo Fundo, Passo Fundo 99052-900, RS, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carla","family":"Alba","sequence":"additional","affiliation":[{"name":"ESAN\u2014Veterinary Course, Universidade de Passo Fundo, Passo Fundo 99052-900, RS, Brazil"},{"name":"ESAN\u2014Programa de P\u00f3s Gradua\u00e7\u00e3o em Bioexperimenta\u00e7\u00e3o, Universidade de Passo Fundo, Passo Fundo 99052-900, RS, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Caroline","family":"Gallas","sequence":"additional","affiliation":[{"name":"ESAN\u2014Veterinary Course, Universidade de Passo Fundo, Passo Fundo 99052-900, RS, Brazil"},{"name":"ESAN\u2014Programa de P\u00f3s Gradua\u00e7\u00e3o em Bioexperimenta\u00e7\u00e3o, Universidade de Passo Fundo, Passo Fundo 99052-900, RS, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Thales Vogt","family":"Kronbauer","sequence":"additional","affiliation":[{"name":"ESAN\u2014Veterinary Course, Universidade de Passo Fundo, Passo Fundo 99052-900, RS, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mateus Timbola","family":"Mozzato","sequence":"additional","affiliation":[{"name":"ESAN\u2014Veterinary Course, Universidade de Passo Fundo, Passo Fundo 99052-900, RS, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dominike Prediger","family":"Delazeri","sequence":"additional","affiliation":[{"name":"ESAN\u2014Veterinary Course, Universidade de Passo Fundo, Passo Fundo 99052-900, RS, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3110-1280","authenticated-orcid":false,"given":"Mariana Groke","family":"Marques","sequence":"additional","affiliation":[{"name":"IFC\u2014Instituto Federal Catarinense, Programa de P\u00f3s-Gradua\u00e7\u00e3o em Produ\u00e7\u00e3o e Sanidade Animal, Conc\u00f3rdia 89703-720, SC, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8866-7974","authenticated-orcid":false,"given":"Eraldo Lourenso","family":"Zanella","sequence":"additional","affiliation":[{"name":"ESAN\u2014Veterinary Course, Universidade de Passo Fundo, Passo Fundo 99052-900, RS, Brazil"},{"name":"ESAN\u2014Programa de P\u00f3s Gradua\u00e7\u00e3o em Bioexperimenta\u00e7\u00e3o, Universidade de Passo Fundo, Passo Fundo 99052-900, RS, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1449-6708","authenticated-orcid":false,"given":"Ricardo","family":"Zanella","sequence":"additional","affiliation":[{"name":"ESAN\u2014Veterinary Course, Universidade de Passo Fundo, Passo Fundo 99052-900, RS, Brazil"},{"name":"ESAN\u2014Programa de P\u00f3s Gradua\u00e7\u00e3o em Bioexperimenta\u00e7\u00e3o, Universidade de Passo Fundo, Passo Fundo 99052-900, RS, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,11,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"379","DOI":"10.1016\/j.theriogenology.2016.04.052","article-title":"Managing the Reproductive Performance of Beef Cows","volume":"86","author":"Diskin","year":"2016","journal-title":"Theriogenology"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"288","DOI":"10.3168\/jds.S0022-0302(92)77764-9","article-title":"Factors Affecting Days Open, Gestation Length, and Calving Interval in Florida Dairy Cattle","volume":"75","author":"Silva","year":"1992","journal-title":"J. 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