An Ultrasonographic Study of Ovarian Antral Follicular Dynamics in Prepubertal Gilts During the Expected Activation of the Hypothalamo-pituitary-ovarian Axis

Tomasz Schwarz , Maciej Murawski , Edward Wierzchoś , Paweł Bartlewski

Abstract

Daily transrectal ultrasonography was carried out in eight 4–5-month-old Polish Large White × Polish Landrace gilts for 42 days to monitor the growth of individual ovarian antral follicles ≥2 mm in diameter. In total, 52.4 ± 16.2 and 123.0 ± 6.7 follicles per gilt (mean ± SD) that grew to ≥4 mm were identified during the first and second 21-day study periods, respectively (P<0.01). Four follicular waves (defined as the synchronous growth of a group of follicles from 2–3 mm to ≥4 mm) emerged during the first period, and five waves emerged during the second period. The maximum diameters attained by the largest follicles of waves were 5.7 ± 0.6 and 7.0 ± 0.5 mm (first and second periods, respectively; P<0.01). The present results provide direct evidence for the rhythmic, wave-like pattern of antral follicle recruitment in prepubertal gilts. The number of follicles and maximum diameter they attain increase significantly during the expected activation of the hypothalamo-pituitary-ovarian axis in prepubescent gilts.
Author Tomasz Schwarz (FoAS / DoSaSRB)
Tomasz Schwarz,,
- Department of Swine and Small Ruminant Breeding
, Maciej Murawski (FoAS / DoSaSRB)
Maciej Murawski,,
- Department of Swine and Small Ruminant Breeding
, Edward Wierzchoś (DoAS / DoSaSRB)
Edward Wierzchoś,,
- Department of Swine and Small Ruminant Breeding
, Paweł Bartlewski
Paweł Bartlewski,,
-
Journal seriesJournal of Reproduction and Development, ISSN 0916-8818, (A 25 pkt)
Issue year2013
Vol59
No4
Pages409-414
Publication size in sheets0.5
Keywords in EnglishAntral follicle, Follicular dynamics, Gilt, Pig, Prepubertal, Ultrasonography
DOIDOI:10.1262/jrd.2012-181
URL https://www.jstage.jst.go.jp/article/jrd/59/4/59_2012-181/_pdf
Internal identifierWHiBZ/2013/94
Languageen angielski
Score (nominal)25
ScoreMinisterial score = 25.0, 19-06-2019, ArticleFromJournal
Ministerial score (2013-2016) = 25.0, 19-06-2019, ArticleFromJournal
Publication indicators WoS Citations = 5
Citation count*1 (2015-12-27)
Additional fields
FinansowanieThe present study was funded by the Polish Ministry of Science and Higher Education (grant N N311 370837)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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