{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,26]],"date-time":"2026-01-26T19:26:02Z","timestamp":1769455562529,"version":"3.49.0"},"reference-count":20,"publisher":"Akademiai Kiado Zrt.","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2007,6,1]]},"abstract":"<jats:p>The origin and evolution of preovulatory follicles (POF) in 9 hyperstimulated (polyovulatory) Serrana goats were characterised. After oestrus synchronisation and detection, transrectal ovarian ultrasonography was performed daily during two complete oestrous cycles. Blood samples were taken every 4 h during 24 h after oestrus detection for preovulatory LH peak and twice a week for plasma progesterone determinations. The interovulatory interval of 14 oestrous cycles with double ovulations was 21.1 \u00b1 0.3 days. The onset of ovulatory follicular wave occurred 4 days (\u22123.9 \u00b1 0.3 days, n = 14) prior to the ovulation day (day 0) with a POF size of 6.9 \u00b1 0.2 mm (n = 28). In goats with ovulations in both ovaries (78.6%), the emergence of the first POF occurred earlier (\u22124.1 \u00b1 0.3 days) than the second POF (\u22123.3 \u00b1 0.2 days, n = 11, P &lt; 0.05). No differences in the total number of follicles \u2265 2 mm were found between the day of POF emergence (4.3 \u00b1 0.4) and the day before ovulation (3.5 \u00b1 0.3, P &gt; 0.05). These results showed the existence of a delay between the emergence of first and second POF and suggest a weak dominance effect in goats with double ovulations.<\/jats:p>","DOI":"10.1556\/avet.55.2007.2.12","type":"journal-article","created":{"date-parts":[[2007,5,3]],"date-time":"2007-05-03T20:25:21Z","timestamp":1178223921000},"page":"259-266","source":"Crossref","is-referenced-by-count":2,"title":["Origin and characterisation of preovulatory follicles of hyperstimulated oestrous cycles in goats"],"prefix":"10.1556","volume":"55","author":[{"given":"J.","family":"Sim\u00f5es","sequence":"first","affiliation":[{"name":"1 University of Tr\u00e1s-os-Montes e Alto Douro CECAV Apartado 1013 5001-811 Vila Real Portugal"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R.","family":"Mascarenhas","sequence":"additional","affiliation":[{"name":"2 Esta\u00e7\u00e3o Zoot\u00e9cnica Nacional INIAP Vale de Santar\u00e9m Portugal"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"425","reference":[{"key":"1","doi-asserted-by":"crossref","first-page":"111","DOI":"10.1530\/jrf.0.1150111","article-title":"Ovarian antral follicular dynamics and their relationships with endocrine variables throughout the oestrous cycle in breeds of sheep differing in prolificacy","volume":"115","author":"Bartlewski P. 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