{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,16]],"date-time":"2026-07-16T15:40:51Z","timestamp":1784216451915,"version":"3.55.0"},"reference-count":19,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2007,2,5]],"date-time":"2007-02-05T00:00:00Z","timestamp":1170633600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Reprod Domestic Animals"],"published-print":{"date-parts":[[2007,6]]},"abstract":"<jats:title>Contents<\/jats:title><jats:p>The present study investigated the changes of serum progesterone (P4) and its faecal metabolites in pregnant and non\u2010pregnant cows (Expt 1) and the feasibilty of using faecal P4 metabolites for early screening of open cows post\u2010insemination (Expt 2). In Expt 1, seven crossbred Holstein\u2013Friesian (HF) cows were studied. Serum and faecal samples were collected once daily from the day of artificial insemination (AI) until 25\u2003days after AI. In Expt 2, 27 crossbred HF inseminated cows were employed. Serum and faecal samples were obtained on the day of AI (day 0) and on days 19\u201322 post\u2010insemination. Enzyme immunoassay measurements of serum P4 and faecal P4 metabolites were established. The low detection limit of the assay was 0.01\u2003ng\/ml and the amount of P4, resulting in a 50% reduction in the initial binding value, was 1.07\u2003ng\/ml. The intra\u2010 and inter\u2010assay coefficients of variation were &lt;8% and &lt;14%, respectively. A positive correlation between the levels of serum P4 and faecal P4 metabolites was found in every single cow (<jats:italic>r<\/jats:italic>\u2003=\u20030.73\u22120.88, p\u2003&lt;\u20030.001) and pooled data (<jats:italic>r<\/jats:italic>\u2003=\u20030.78, p\u2003&lt;\u20030.001). The estimated value of faecal P4 metabolites at 100\u2003ng\/g of faeces was equal to the serum P4 levels of 1\u2003ng\/ml. The accuracies of pregnancy and non\u2010pregnancy diagnosis based on the analyses of faecal P4 metabolites between day 0 and days 19\u201322 post\u2010insemination, were 67% and 100%, respectively. In conclusion, the measurement of faecal P4 metabolites can be a potentially alternative method for early screening of open cows post\u2010insemination with the same accuracy and precision, as measured by serum P4 assay.<\/jats:p>","DOI":"10.1111\/j.1439-0531.2006.00758.x","type":"journal-article","created":{"date-parts":[[2007,2,5]],"date-time":"2007-02-05T19:25:05Z","timestamp":1170703505000},"page":"238-242","source":"Crossref","is-referenced-by-count":9,"title":["Measurement of Faecal Progesterone Metabolites and its Application for Early Screening of Open Cows Post\u2010insemination"],"prefix":"10.1111","volume":"42","author":[{"given":"B","family":"Kornmatitsuk","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C","family":"Thitaram","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S","family":"Kornmatitsuk","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2007,2,5]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1095\/biolreprod51.4.668"},{"key":"e_1_2_6_3_1","first-page":"441","article-title":"The use of milk progesterone and electrical vaginal probe as aids in large dairy herd reproductive management","volume":"75","author":"Cavestany D","year":"1985","journal-title":"Cornell Vet"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.1439-0531.2001.00255.x"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0093-691X(00)00409-X"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1292\/jvms.57.845"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.1344-3941.2003.00128.x"},{"key":"e_1_2_6_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.anireprosci.2005.02.004"},{"key":"e_1_2_6_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.anireprosci.2004.08.006"},{"key":"e_1_2_6_10_1","doi-asserted-by":"publisher","DOI":"10.1677\/joe.0.1010041"},{"key":"e_1_2_6_11_1","doi-asserted-by":"crossref","first-page":"78","DOI":"10.1016\/S0007-1935(17)31791-8","article-title":"Progesterone in defatted milk: its relation to insemination and pregnancy in normal cows as compared with cows on problem farms and individual problem animals","volume":"137","author":"Oltner R","year":"1981","journal-title":"Br Vet J"},{"key":"e_1_2_6_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/0378-4320(95)01458-6"},{"key":"e_1_2_6_13_1","doi-asserted-by":"publisher","DOI":"10.3168\/jds.S0022-0302(85)81160-7"},{"key":"e_1_2_6_14_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0378-4320(01)00130-0"},{"key":"e_1_2_6_15_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0378-4320(02)00169-0"},{"key":"e_1_2_6_16_1","doi-asserted-by":"publisher","DOI":"10.1016\/0378-4320(96)01561-8"},{"key":"e_1_2_6_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/0093-691X(96)00138-0"},{"key":"e_1_2_6_18_1","doi-asserted-by":"publisher","DOI":"10.1016\/0093-691X(78)90127-9"},{"key":"e_1_2_6_19_1","doi-asserted-by":"publisher","DOI":"10.1016\/0093-691X(93)90253-2"},{"key":"e_1_2_6_20_1","doi-asserted-by":"publisher","DOI":"10.1016\/0093-691X(79)90052-9"}],"container-title":["Reproduction in Domestic Animals"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1111%2Fj.1439-0531.2006.00758.x","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/j.1439-0531.2006.00758.x","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,10,10]],"date-time":"2023-10-10T14:52:37Z","timestamp":1696949557000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/j.1439-0531.2006.00758.x"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2007,2,5]]},"references-count":19,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2007,6]]}},"alternative-id":["10.1111\/j.1439-0531.2006.00758.x"],"URL":"https:\/\/doi.org\/10.1111\/j.1439-0531.2006.00758.x","archive":["Portico"],"relation":{},"ISSN":["0936-6768","1439-0531"],"issn-type":[{"value":"0936-6768","type":"print"},{"value":"1439-0531","type":"electronic"}],"subject":[],"published":{"date-parts":[[2007,2,5]]}}}