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Experiment 1 was conducted within (<jats:styled-content style=\"fixed-case\">IN<\/jats:styled-content>) the breeding season (autumn, <jats:italic>n<\/jats:italic>\u00a0=\u00a036), and experiment 2 was conducted outside (<jats:styled-content style=\"fixed-case\">OUT<\/jats:styled-content>) of the breeding season (spring, <jats:italic>n<\/jats:italic>\u00a0=\u00a043). In each experiment, the sheep were divided into two groups (6 or 12\u00a0days) according to the duration of treatment with a single\u2010use progesterone release vaginal device (<jats:styled-content style=\"fixed-case\">CIDR<\/jats:styled-content><jats:sup>\u00ae<\/jats:sup>, Pfizer, S\u00e3o Paulo, <jats:styled-content style=\"fixed-case\">SP<\/jats:styled-content>, Brazil), and blood samples were collected from 10 animals per group every 4\u00a0hr to measure the <jats:styled-content style=\"fixed-case\">LH<\/jats:styled-content> and progesterone concentrations. In the spring, the characteristics of the <jats:styled-content style=\"fixed-case\">LH<\/jats:styled-content> peak did not differ between groups; but in the autumn, there were differences between groups at the beginning (G\u20106 <jats:styled-content style=\"fixed-case\">IN<\/jats:styled-content>: 36.44\u00a0\u00b1\u00a05.46\u00a0hr; G\u201012 <jats:styled-content style=\"fixed-case\">IN<\/jats:styled-content>: 26.57\u00a0\u00b1\u00a04.99\u00a0hr) and end of the <jats:styled-content style=\"fixed-case\">LH<\/jats:styled-content> peak (G\u20106 <jats:styled-content style=\"fixed-case\">IN<\/jats:styled-content>: 46.22\u00a0\u00b1\u00a07.51\u00a0hr; G\u201012 <jats:styled-content style=\"fixed-case\">IN<\/jats:styled-content>: 34.86\u00a0\u00b1\u00a08.86\u00a0hr). The results showed alterations in the <jats:styled-content style=\"fixed-case\">LH<\/jats:styled-content> peak during the breeding season only in the sheep undergoing the short\u2010term protocol.<\/jats:p>","DOI":"10.1111\/asj.13051","type":"journal-article","created":{"date-parts":[[2018,6,20]],"date-time":"2018-06-20T08:01:29Z","timestamp":1529481689000},"page":"1245-1252","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Characterization of the <scp>LH<\/scp> peak after short and long fixed\u2010time artificial insemination protocols in sheep raised in the tropics"],"prefix":"10.1111","volume":"89","author":[{"given":"Gabriela Azenha Milani","family":"Soriano","sequence":"first","affiliation":[{"name":"Universidade do Oeste Paulista Presidente Prudente (UNOESTE) SP Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Felipe Rydygier","family":"de Ruediger","sequence":"additional","affiliation":[{"name":"Universidade Estadual Paulista (UNESP) Botucatu SP Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marilice","family":"Zundt","sequence":"additional","affiliation":[{"name":"Universidade do Oeste Paulista Presidente Prudente (UNOESTE) SP Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marco Aur\u00e9lio da Cruz Nobre","family":"Gomes","sequence":"additional","affiliation":[{"name":"Universidade do Oeste Paulista Presidente Prudente (UNOESTE) SP Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lilian Francisco Arantes","family":"de Souza","sequence":"additional","affiliation":[{"name":"Universidade do Oeste Paulista Presidente Prudente (UNOESTE) SP Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ines Cristina","family":"Giometti","sequence":"additional","affiliation":[{"name":"Universidade do Oeste Paulista Presidente Prudente (UNOESTE) SP Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guilherme","family":"de Paula Nogueira","sequence":"additional","affiliation":[{"name":"Universidade Estadual Paulista (UNESP) Ara\u00e7atuba SP Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gustavo Ricci","family":"Zanelli","sequence":"additional","affiliation":[{"name":"Universidade do Oeste Paulista Presidente Prudente (UNOESTE) SP Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fabiola Cristiane","family":"de Almeida Rego","sequence":"additional","affiliation":[{"name":"Universidade Norte do Paran\u00e1 (UNOPAR) Arapongas PR Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3300-8116","authenticated-orcid":false,"given":"Cali\u00ea","family":"Castilho","sequence":"additional","affiliation":[{"name":"Universidade do Oeste Paulista Presidente Prudente (UNOESTE) SP Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2018,6,20]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.theriogenology.2004.07.001"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11250-014-0672-8"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0093-691X(03)00215-2"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/rda.12209"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1210\/en.140.6.2471"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-079X.2009.00674.x"},{"key":"e_1_2_6_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/0378-4320(90)90040-M"},{"key":"e_1_2_6_9_1","doi-asserted-by":"publisher","DOI":"10.5433\/1679-0359.2015v36n3p1419"},{"key":"e_1_2_6_10_1","first-page":"104","volume-title":"Col\u00e9gio Brasileiro de Reprodu\u00e7\u00e3o Animal. 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