{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,27]],"date-time":"2025-12-27T21:13:12Z","timestamp":1766869992008,"version":"3.41.2"},"reference-count":35,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2024,6,19]],"date-time":"2024-06-19T00:00:00Z","timestamp":1718755200000},"content-version":"vor","delay-in-days":18,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Reprod Domestic Animals"],"published-print":{"date-parts":[[2024,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>This study evaluated the effect of bovine somatotropin (bST) on pregnancy rate (PR) and size of the dominant follicle (DF) on the day of intravaginal progesterone (P4) removal in protocols for fixed\u2010time artificial insemination (FTAI). <jats:italic>Bos indicus<\/jats:italic> (Nellore) females (<jats:italic>n<\/jats:italic>\u2009=\u2009392) were distributed into three groups. The control group (CG; <jats:italic>n<\/jats:italic>\u2009=\u200992) received an intravaginal P4 device + estradiol benzoate on day (d)0; prostaglandin F2\u03b1 on d7 (first application); removal of P4\u2009+\u2009estradiol cypionate (EC)\u2009+\u2009PGF2\u03b1 (second application)\u2009+\u2009ultrasound (US) of the DF on d9; the FTAI was performed on d11; and pregnancy diagnosis (PD) was performed on d45. The bST group (bSTG; <jats:italic>n<\/jats:italic>\u2009=\u2009142) underwent the same protocol as the CG, except that the animals received 125\u2009mg of bST on d7. The equine chorionic gonadotropin (eCG) group (eCGG; <jats:italic>n<\/jats:italic>\u2009=\u2009158) underwent the same protocol as the CG, except that the animals received 300\u2009IU of eCG on d9. The PRs of the bSTG, eCGG, and CG were 48%, 48%, and 35%, respectively (<jats:italic>p<\/jats:italic>\u2009&lt;\u2009.05); the bSTG and eCGG showed greater PRs, with follicles 6\u20137.9\u2009mm (<jats:italic>p<\/jats:italic>\u2009&lt;\u2009.05) and 8\u20138.9\u2009mm in diameter, respectively. The bSTG exhibited a greater dimension of the DF on d9 of the protocol (<jats:italic>p<\/jats:italic>\u2009&lt;\u2009.05). The eCGG had higher PRs with a body condition score (BCS) of 2.5, and the bSTG had a BCS of 3.0 (<jats:italic>p<\/jats:italic>\u2009&lt;\u2009.05). It was concluded that bST increased PR, bST showed better performance in smaller DF and larger follicular diameter on d9 of the protocol, eCG acted better on animals with lower BCSs, and bST can be used in FTAI.<\/jats:p>","DOI":"10.1111\/rda.14642","type":"journal-article","created":{"date-parts":[[2024,6,19]],"date-time":"2024-06-19T07:19:56Z","timestamp":1718781596000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Bovine somatotropin increases the pregnancy rate in fixed\u2010time artificial insemination in beef cattle"],"prefix":"10.1111","volume":"59","author":[{"given":"Vitor Mohad","family":"Valle","sequence":"first","affiliation":[{"name":"Programa de P\u00f3s\u2010Gradua\u00e7\u00e3o em Ci\u00eancia Animal Pontif\u00edcia Universidade Cat\u00f3lica do Paran\u00e1 (PUC)  Curitiba Paran\u00e1 Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Clovis Juk","family":"Fazzano","sequence":"additional","affiliation":[{"name":"Fazzembryo Consultoria T\u00e9cnica  Ara\u00e7atuba S\u00e3o Paulo Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marcio Saporski","family":"Segui","sequence":"additional","affiliation":[{"name":"Programa de P\u00f3s\u2010Gradua\u00e7\u00e3o em Ci\u00eancia Animal Pontif\u00edcia Universidade Cat\u00f3lica do Paran\u00e1 (PUC)  Curitiba Paran\u00e1 Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fernando Andrade","family":"Souza","sequence":"additional","affiliation":[{"name":"Federal University of Paran\u00e1  Curitiba Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tharini Xavier Accioly","family":"Kaled","sequence":"additional","affiliation":[{"name":"Programa de P\u00f3s\u2010Gradua\u00e7\u00e3o em Ci\u00eancia Animal Pontif\u00edcia Universidade Cat\u00f3lica do Paran\u00e1 (PUC)  Curitiba Paran\u00e1 Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marcio Gianardoli Teixeira","family":"Gomes","sequence":"additional","affiliation":[{"name":"Federal University of North Tocantins  Aragua\u00edna Tocantins Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7931-455X","authenticated-orcid":false,"given":"Eriklis","family":"Nogueira","sequence":"additional","affiliation":[{"name":"EMBRAPA Beef Cattle Center  Campo Grande Mato Grosso do Sul Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3700-1811","authenticated-orcid":false,"given":"Luiz Ernandes","family":"Kozicki","sequence":"additional","affiliation":[{"name":"Programa de P\u00f3s\u2010Gradua\u00e7\u00e3o em Ci\u00eancia Animal Pontif\u00edcia Universidade Cat\u00f3lica do Paran\u00e1 (PUC)  Curitiba Paran\u00e1 Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2024,6,19]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.5380\/avs.v10i2.4410"},{"key":"e_1_2_10_3_1","first-page":"47","article-title":"Morfologia esperm\u00e1tica de touros: interpreta\u00e7\u00e3o e impacto na fertilidade","volume":"39","author":"Arruda R. 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