{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T01:47:18Z","timestamp":1790387238790,"version":"4.1.0"},"reference-count":0,"publisher":"Medpharm Publications","issue":"4","license":[{"start":{"date-parts":[[1998,7,13]],"date-time":"1998-07-13T00:00:00Z","timestamp":900288000000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. S. Afr. Vet. Assoc."],"abstract":"<jats:p>Sixty-four Thoroughbred and Anglo-Arab mares aged 6-12 years were randomly allocated to 4 dietary groups and fed diets that differed in the total protein content and quality (essential amino-acids). Forty mares were non-lactating and 24 lactating. Eight mares were withdrawn from the investigation owing to injuries or gynaecological pathology. An overall conception rate of 94.6%and a foaling rate of 80%was achieved. Five of 14 (35.7 %) mares (Group 1) fed a low-quality protein diet suffered from early embryonic loss before 90 days of pregnancy compared to 3 of 41 (7.3 %) mares in the remaining groups that received the higher-quality protein in their diets. Serum progestagen concentrations of mares in Group 1 that suffered foetal loss were indicative of luteal function insufficiency during the 1st 40 days post-ovulation. Non-lactating mares in all 4 groups gained on average approximately 30 kg in mass during the 90 days before the breeding period. Lactating mares in Group 1 (low-quality protein) lost on average 25 kg in mass during lactation, with no weight loss observed among the lactating mares in the other 3 groups. No difference in the diameter of the embryonic vesicle was found between dietary groups until Day 35 of pregnancy.<\/jats:p>","DOI":"10.4102\/jsava.v69i4.844","type":"journal-article","created":{"date-parts":[[2012,8,24]],"date-time":"2012-08-24T14:25:57Z","timestamp":1345818357000},"page":"150-155","source":"Crossref","is-referenced-by-count":16,"title":["The effect of dietary protein on reproduction in the mare. VII. Embryonic development, early embryonic death, foetal losses and their relationship with serum progestagen"],"prefix":"10.36303","volume":"69","author":[{"given":"F.E.","family":"Van Niekerk","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C.H.","family":"Van Niekerk","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"22149","published-online":{"date-parts":[[1998,7,13]]},"container-title":["Journal of the South African Veterinary Association"],"original-title":[],"link":[{"URL":"https:\/\/journals.jsava.aosis.co.za\/index.php\/jsava\/article\/viewFile\/844\/818","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.jsava.aosis.co.za\/index.php\/jsava\/article\/viewFile\/844\/818","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,1,30]],"date-time":"2023-01-30T14:54:31Z","timestamp":1675090471000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.jsava.aosis.co.za\/index.php\/jsava\/article\/view\/844"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1998,7,13]]},"references-count":0,"journal-issue":{"issue":"4","published-online":{"date-parts":[[1998,7,13]]}},"URL":"https:\/\/doi.org\/10.4102\/jsava.v69i4.844","relation":{},"ISSN":["2224-9435","1019-9128"],"issn-type":[{"value":"2224-9435","type":"electronic"},{"value":"1019-9128","type":"print"}],"subject":[],"published":{"date-parts":[[1998,7,13]]}}}