{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,2]],"date-time":"2025-08-02T18:56:12Z","timestamp":1754160972327,"version":"3.41.2"},"reference-count":40,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2025,7,24]],"date-time":"2025-07-24T00:00:00Z","timestamp":1753315200000},"content-version":"vor","delay-in-days":23,"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":[[2025,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:p>This study investigated the effects of hCG administration during different times after mating on the reproductive parameters of Torki\u2010Ghashghaei sheep. In the first experiment, 75 Torki\u2010Ghashghaei ewes and 56 ewe lambs were synchronised for 14\u2009days. One day before withdrawing the sponges, 400 and 350\u2009IU of eCG were injected into ewes and ewe lambs, respectively. Then the ewes and ewe lambs were divided into five and four groups, respectively, based on not receiving (control) or receiving hCG in ewes on 1.5, 2, 4 and 6\u2009days and in ewe lambs on 1.5, 2 and 6\u2009days after mating. The results of the first experiment showed that the rate of multiple twinning, the number of lambs born, fecundity, prolificacy and progesterone concentration in ewes and ewe lambs receiving hCG on days 1.5 and two were significantly higher than those in the other groups (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05). In the second experiment, 316 ewes and 304 ewe lambs were synchronised and received 400 and 300\u2009IU of hCG, respectively, and were divided into two groups based on receiving hCG one day and a half (hCG\u20101.5) and two days (hCG\u20102) after mating. The results showed that multiple births in ewes were significantly higher in the hCG\u20101.5 group compared to the hCG\u20102 group. The results of this study generally showed that the use of hCG on all different days after mating increased the concentration of serum progesterone. Ewes and ewe lambs receiving hCG on days 1.5 and two had the best reproductive performance compared to the other groups. In conclusion, the application of hCG on 1.5\u2009days after mating in Torki\u2010Ghashghaei ewes and ewe lambs during the out\u2010breeding season could be recommended for improving twinning rate, the number of lambs born and prolificacy rate.<\/jats:p>","DOI":"10.1111\/rda.70094","type":"journal-article","created":{"date-parts":[[2025,7,24]],"date-time":"2025-07-24T13:11:05Z","timestamp":1753362665000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["hCG Effects Are Related to the Day of Administration After Mating in Synchronous Estrus Induced Torki\u2010Ghashghaei Sheep"],"prefix":"10.1111","volume":"60","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2802-1260","authenticated-orcid":false,"given":"Javad","family":"Habibizad","sequence":"first","affiliation":[{"name":"Department of Animal Science, Faculty of Agriculture Yasouj University  Yasouj Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mehrdad","family":"Meamar","sequence":"additional","affiliation":[{"name":"Department of Animal Science, Faculty of Agriculture Yasouj University  Yasouj Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mohsen","family":"Towhidi","sequence":"additional","affiliation":[{"name":"Nomads Administration of Kohgiloye and Boyerahmad Province  Yasouj Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mustafa","family":"Muhaghegh\u2010Dolatabady","sequence":"additional","affiliation":[{"name":"Department of Animal Science, Faculty of Agriculture Yasouj University  Yasouj Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jeferson Ferreira","family":"da Fonseca","sequence":"additional","affiliation":[{"name":"Embrapa Caprinos e Ovinos  Coronel Pacheco Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2025,7,24]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.smallrumres.2015.10.002"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0093\u2010691X(98)00216\u20107"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1095\/biolreprod.112.105684"},{"issue":"4","key":"e_1_2_10_5_1","first-page":"226","article-title":"Reproductive Performance of PLS and BCP Ewes Exposed to hCG at the Follicular Phase of the Estrous Cycle","volume":"68","author":"Bobowiec R.","year":"2012","journal-title":"Medycyna Weterynaryjna"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0378\u20104320(03)00158\u20101"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0378\u20104320(02)00071\u20104"},{"key":"e_1_2_10_8_1","article-title":"Effect of hCG Administration on Accessory Corpus Luteum Formation and Area in Estrous Induced Nulliparous Santa Ines Ewes","volume":"21","author":"Castro A. 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