{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,23]],"date-time":"2026-04-23T03:58:35Z","timestamp":1776916715966,"version":"3.51.2"},"reference-count":42,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2021,7,2]],"date-time":"2021-07-02T00:00:00Z","timestamp":1625184000000},"content-version":"vor","delay-in-days":0,"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":[[2021,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The objective of the study was to compare the fertility after using sex\u2010sorted or conventional semen either with oestrus detection (EST) or timed artificial insemination (TAI) in Holstein heifers. Holstein heifers were randomly assigned to one of the following treatments in a 2\u00a0\u00d7\u00a02 factorial design. Heifers in the EST group were inseminated with sex\u2010sorted (<jats:italic>n<\/jats:italic>\u00a0=\u00a0114) or conventional semen (<jats:italic>n<\/jats:italic>\u00a0=\u00a0100) after spontaneous or induced oestrus. Heifers in the TAI, subjected to the 5\u2010day Cosynch+Progesterone protocol (GnRH+P4 insertion\u20105d\u2010PGF<jats:sub>2\u03b1<\/jats:sub>+P4 removal\u20101d\u2010PGF<jats:sub>2\u03b1<\/jats:sub>\u20102d\u2010GnRH+TAI), were inseminated with sex\u2010sorted (<jats:italic>n<\/jats:italic>\u00a0=\u00a0113) or conventional semen (<jats:italic>n<\/jats:italic>\u00a0=\u00a088). Statistical analyses were performed using PROC GLIMMIX procedure of SAS 9.4 (SAS Institute Inc., Cary, NC). Overall P\/AI was 60.7% for EST and 54.2% for TAI regardless of types of semen and 68.1% for conventional and 48.9% for sex\u2010sorted semen regardless of insemination strategies. Fertility of heifers inseminated with either sex\u2010sorted (53.5%; 44.2%) or conventional (69.0%; 67.0%) semen did not differ between EST and TAI respectively. Besides, the interaction between the semen type and the insemination strategy was not significant for P\/AI. The embryonic loss was significantly greater with sex\u2010sorted semen (17.1%) compared to conventional semen (1.6%). There was no sire effect with sex\u2010sorted semen on P\/AI (52.6% vs. 46.2%) and embryonic loss (16.4% vs. 18.0%). As expected, sex\u2010sorted semen resulted in more female calves (89.8% vs. 51.6%) than conventional semen. Thus, sex\u2010sorted semen can be used with 5\u2010day Cosynch+Progesterone protocol to eliminate the inadequate oestrus detection and to increase female calves born in dairy heifers.<\/jats:p>","DOI":"10.1111\/rda.13984","type":"journal-article","created":{"date-parts":[[2021,6,26]],"date-time":"2021-06-26T13:14:58Z","timestamp":1624713298000},"page":"1254-1260","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Comparison of pregnancy per AI of heifers inseminated with sex\u2010sorted or conventional semen after oestrus detection or timed artificial insemination"],"prefix":"10.1111","volume":"56","author":[{"given":"Baris","family":"Guner","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology Faculty of Veterinary Medicine University of Bal\u0131kesir Bal\u0131kesir Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gulsum","family":"Selcuk","sequence":"additional","affiliation":[{"name":"Atasancak Dairy Farm Denizli Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sevket","family":"Guclu","sequence":"additional","affiliation":[{"name":"Atasancak Dairy Farm Denizli Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sultan","family":"Sengul","sequence":"additional","affiliation":[{"name":"Atasancak Dairy Farm Denizli Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ismail","family":"Altun","sequence":"additional","affiliation":[{"name":"Atasancak Dairy Farm Denizli Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Serdal","family":"Dikmen","sequence":"additional","affiliation":[{"name":"Department of Animal Science Faculty of Veterinary Medicine University of Bursa Uludag Bursa Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3607-4365","authenticated-orcid":false,"given":"Ahmet","family":"Gumen","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Faculty of Veterinary Medicine University of Bursa Uludag Bursa Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2021,7,2]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.theriogenology.2005.04.011"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.theriogenology.2008.09.026"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.3168\/jds.2006-694"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.3168\/jds.2009-2858"},{"issue":"7","key":"e_1_2_10_6_1","first-page":"365","article-title":"Pregnancy per AI in Holstein heifers inseminated with sexed semen after detected estrus or timed\u2010AI","volume":"58","author":"Colazo M. 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