{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T05:59:08Z","timestamp":1760162348940,"version":"3.41.2"},"reference-count":29,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2024,7,15]],"date-time":"2024-07-15T00:00:00Z","timestamp":1721001600000},"content-version":"vor","delay-in-days":14,"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":[[2024,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>This study evaluated the relationship between CL features assessed by ultrasound (luteal tissue area and blood flow, BF) or rectal palpation (size), uterine tone (UT), plasma progesterone (P4) concentration on Day 7 (D7) and subsequent pregnancy outcomes in bovine embryo recipients. A total of 163 cows and heifers were included in this study. The expected day of ovulation after the synchronization protocol was designated as D0. On D7, ovaries and uterus were examined by ultrasonography and rectal palpation, and subjective scores (1\u20133 scale) were assigned for CL size, area and BF, and for UT. Blood samples were collected for further P4 analysis. Each embryo recipient then received a grade I frozen\u2013thawed in\u00a0vivo<jats:italic>\u2010<\/jats:italic>produced blastocyst, which was transferred to the uterine horn ipsilateral to the CL. Pregnancy diagnosis was performed on D35, and the results were retrospectively compared with the assigned scores for CL and UT. We observed a significant (<jats:italic>p<\/jats:italic>\u2009&lt;\u2009.02) interaction between CL size and UT, with a progressive increase in the likelihood of pregnancy for recipients bearing a large CL among those with turgid UT. Ultrasound scoring of the CL using B\u2010mode and Doppler\u2010mode did not significantly predict pregnancy rates on D35 (<jats:italic>p<\/jats:italic>\u2009&lt;\u2009.6 and <jats:italic>p<\/jats:italic>\u2009&lt;\u2009.5, respectively). However, logistic regression analysis revealed a trend towards a quadratic effect (<jats:italic>p<\/jats:italic>\u2009&lt;\u2009.08 and <jats:italic>p<\/jats:italic>\u2009&lt;\u2009.06) indicating that the probability of pregnancy varied according to the area of luteal tissue and P4 concentrations, respectively. No significant (<jats:italic>p<\/jats:italic>\u2009&gt;\u2009.05) association was found between the probability of pregnancy and the BF area of the CL. In summary, UT before embryo transfer may reflect successful recipient synchronization. Elevated P4 levels, assessed by CL size, may offset uterine contractility, mitigating adverse effects. Additionally, the CL area may be more important than its vascularization area when evaluating recipients D7 after ovulation.<\/jats:p>","DOI":"10.1111\/rda.14671","type":"journal-article","created":{"date-parts":[[2024,7,15]],"date-time":"2024-07-15T07:05:04Z","timestamp":1721027104000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Uterine tone: A neglected criterion for the selection of bovine embryo transfer recipients"],"prefix":"10.1111","volume":"59","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5878-7526","authenticated-orcid":false,"given":"Cristiano Rodrigues Borges","family":"Guimar\u00e3es","sequence":"first","affiliation":[{"name":"Veterinary Practitioner  Alfenas MG Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-3343-9904","authenticated-orcid":false,"given":"Matheus Felipe","family":"Seber","sequence":"additional","affiliation":[{"name":"Veterinary Practitioner  Pouso Alegre MG Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3185-0513","authenticated-orcid":false,"given":"Jos\u00e9 da P\u00e1scoa Nascimento","family":"Neto","sequence":"additional","affiliation":[{"name":"Federal University of Lavras\u2014UFLA  Lavras MG Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1764-7866","authenticated-orcid":false,"given":"Carlos Ant\u00f4nio Carvalho","family":"Fernandes","sequence":"additional","affiliation":[{"name":"Biotran LTDA  Alfenas MG Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0004-1297-378X","authenticated-orcid":false,"given":"\u00c9der Pereira Campos Drumond","family":"Rodrigues","sequence":"additional","affiliation":[{"name":"Federal University of Lavras\u2014UFLA  Lavras MG Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3614-7886","authenticated-orcid":false,"given":"B\u00e1rbara Azevedo Pereira","family":"Torres","sequence":"additional","affiliation":[{"name":"Federal University of Lavras\u2014UFLA  Lavras MG Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3742-2368","authenticated-orcid":false,"given":"Jo\u00e3o Henrique","family":"Moreira\u00a0Viana","sequence":"additional","affiliation":[{"name":"Embrapa  Bras\u00edlia DF Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6670-4946","authenticated-orcid":false,"given":"Miller Pereira","family":"Palh\u00e3o","sequence":"additional","affiliation":[{"name":"Federal University of Lavras\u2014UFLA  Lavras MG Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2024,7,15]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.rbmo.2020.08.006"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0378\u20104320(00)00076\u20102"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.3390\/VETSCI10040262"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/J.THERIOGENOLOGY.2023.07.039"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.3168\/jds.S0022\u20100302(89)79081\u20100"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1590\/S0102\u201009351999000300011"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.2527\/1995.7361852X"},{"volume-title":"Color\u2010Doppler ultrasonography: Book 4","year":"2007","author":"Ginther O. 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