{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,10,3]],"date-time":"2023-10-03T14:42:06Z","timestamp":1696344126509},"reference-count":29,"publisher":"Akademiai Kiado Zrt.","issue":"4","content-domain":{"domain":["akjournals.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2004,10,1]]},"abstract":"<jats:p>Induction of ovulation for timed artificial insemination (TAI) with the Ovsynch protocol was evaluated in 49 anoestrous and lactating <jats:italic>Bos taurus \u00d7 Bos indicus<\/jats:italic> cows. Palpation per rectum and transrectal ultrasonography were used on Days -30, -20, -10 and 0 (start of treatment) to confirm anoestrus but with the presence of follicles = 10 mm, and every other day during treatment to determine ovarian activity. Cows were randomly assigned to: (1) Ovsynch (n = 24; Day 0, 200 \u00b5g GnRH; Day 7, 150 \u00b5g PGF<jats:sub>2a<\/jats:sub>; Day 9, 200 \u00b5g GnRH + TAI 16 to 20 h later) and (2) control (n = 25; no treatment). Rates of ovulation for the first GnRH injection, detection of a corpus luteum (CL) at PGF<jats:sub>2a<\/jats:sub> injection, pregnancy and induction of cyclicity were greater (P &lt; 0.05) with Ovsynch. There was no effect of body condition score (P ? 0.05). In conclusion, the Ovsynch protocol was not effective in obtaining acceptable pregnancy rate for TAI, but it was effective for induction of cyclicity in anoestrous and lactating <jats:italic>Bos taurus \u00d7 Bos indicus<\/jats:italic> cows under tropical conditions.<\/jats:p>","DOI":"10.1556\/avet.52.2004.4.12","type":"journal-article","created":{"date-parts":[[2005,3,22]],"date-time":"2005-03-22T15:02:17Z","timestamp":1111503737000},"page":"501-508","update-policy":"http:\/\/dx.doi.org\/10.1556\/policypage.crossmark.crossref.1","source":"Crossref","is-referenced-by-count":2,"title":["Induction of ovulation with GnRH and PGF2a in lactating Bos taurus \u00d7 Bos indicus cows"],"prefix":"10.1556","volume":"52","author":[{"given":"C.","family":"Ahuja","sequence":"first","affiliation":[{"name":"1 Department of Reproduction, Faculty of Veterinary Medicine, University of Veracruz Circunvalaci\u00f3n S\/N Esquina Ya\u00f1ez, C\u00f3digo Postal 91740 Veracruz, Ver., Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"F.","family":"Montiel","sequence":"additional","affiliation":[{"name":"2 Department of Reproduction, Faculty of Veterinary Medicine, University of Veracruz Circunvalaci\u00f3n S\/N Esquina Ya\u00f1ez, C\u00f3digo Postal 91740 Veracruz, Ver., Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"425","reference":[{"key":"27","doi-asserted-by":"crossref","first-page":"1173","DOI":"10.2527\/2002.8051173x","article-title":"Comparison of three approaches for synchronization of ovulation for timed artificial insemination in Bos indi-cusinfluenced cattle managed on the Texas Gulf coast.","volume":"80","author":"S. 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