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
AbstractDaily 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.
|Journal series||Journal of Reproduction and Development, ISSN 0916-8818, (A 25 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||Antral follicle, Follicular dynamics, Gilt, Pig, Prepubertal, Ultrasonography|
|Score|| = 25.0, 19-06-2019, ArticleFromJournal|
= 25.0, 19-06-2019, ArticleFromJournal
|Publication indicators||= 5|
|Citation count*||1 (2015-12-27)|
|Finansowanie||The present study was funded by the Polish Ministry of Science and Higher Education (grant N N311 370837)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.