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Additionally, their hair cortisol levels were analyzed to evaluate the extent of stress experienced during dry and lactation periods. B cross\u2010bred cows had lower milk yields and higher milk fat rates than H cows. Reproductive records showed that days from parturition to first artificial insemination (<jats:styled-content style=\"fixed-case\">AI)<\/jats:styled-content> in B cross\u2010bred (<jats:italic>n<\/jats:italic>\u00a0=\u00a016) and H (<jats:italic>n<\/jats:italic>\u00a0=\u00a027) cows were not significantly different, but conception rate at first <jats:styled-content style=\"fixed-case\">AI<\/jats:styled-content> of B cross\u2010bred cows tended to be higher than that of H cows. Percentage of B cross\u2010bred cows that resumed ovarian cyclic activity within 45\u00a0days after parturition was higher than that of H cows (6\/6 (100%) and 5\/11 (45.5%), <jats:italic>P<\/jats:italic>\u00a0&lt;\u00a00.05), and B cross\u2010bred cows had higher body condition scores at that time. Hair cortisol level at 60 to 90\u00a0days after parturition in H cows increased significantly compared with in the dry period, and it was higher than that of B cows during the same period. These results suggest that B cross\u2010bred cows experience less metabolic stress during early lactation, which may result in earlier resumption of reproductive function.<\/jats:p>","DOI":"10.1111\/asj.12828","type":"journal-article","created":{"date-parts":[[2017,5,26]],"date-time":"2017-05-26T09:22:55Z","timestamp":1495790575000},"page":"1506-1512","source":"Crossref","is-referenced-by-count":10,"title":["Comparison of productive and reproductive performance and hair cortisol levels between Brown Swiss cross\u2010bred and Holstein cows housed in the same barn"],"prefix":"10.1111","volume":"88","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6628-696X","authenticated-orcid":false,"given":"Natsumi","family":"Endo","sequence":"first","affiliation":[{"name":"Laboratory of Veterinary Reproduction Tokyo University of Agriculture and Technology Fuchu\u2010city Tokyo 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