Record Details

Ultrasonographic study on follicular dynamics in repeat breeding Holstein Friesian cows

Indian Agricultural Research Journals

View Archive Info
 
 
Field Value
 
Title Ultrasonographic study on follicular dynamics in repeat breeding Holstein Friesian cows
 
Creator Patel, J A
Kavani, F S
Dhami, A J
 
Subject Follicular dynamics; Oestrous cycle; Repeat breeding cows; Ultrasonography
 
Description Trans-rectal ultrasound scanning ofovaries ofrepeat breeding cows (6) performed daily over one full cycle revealed the presence of2 patterns of ovarian follicular development per cycle, viz. 2-wave (66.66%, n=4) or 3-wave (33.33%, n=2). In two-wave cycle, the first and second waves began at day O.75±0.25 and 13.75±0.48 respectively. In 3-wave cycle, the first, second and third waves began at day 0.50±O.50, 9.00±O.OO and 16.50±O.50 respectively. There was no significant difference between 2-and 3-wave cycles with regard to the day of the emergence of the first wave. The second wave appeared significantly earlier in the oestrous cycle with 3-wave than with 2-wave. The persistence of the first dominant follicle was longer in 2-wave cycle than that in 3-wave cycle. The duration of the growth and static phases and regression phase of the first dominant follicle did not differ between 2- and 3-wave cycles. The maximum diameters of both first dominant follicle and ovulatory follicle were identical in 2- and 3-wave cycles. In 2-wave cycle, the maximum diameter of ovulatory follicle was significantly larger than the first dominant follicle. However, no statistical differences were observed between the maximum diameters of dominant follicles for 3-wave cycles. The 2and 3-wave cycles also differed significantly with respect to the Olean length of intervals between 2 oestruses and between 2 ovulations. The linear growth rate (rom/day) was lower in ovulatory follicle than that in first dominant follicle in 2-wave and 3-wave cycles. The linear growth of ovulatory follicle differed between 2- and 3-wave cycles. In 2-wave cycle, there was no relationship between the development of dominant follicle and presence of CL in either of the ovaries. While in 3-wave cycle, first dominant follicle and ovulatory follicle developed on ovary opposite ofCL. No statistical difference was found in the mean number offollicles recruited per wave in 2- and 3-wave cycles. However, the first wave had a larger number of follicles than subsequent waves. There was a positive correlation between CL diameter and P4 value. The mean plasma P4 values on various days of cycle were higher in 3-wave as compared to 2wave cycle. 
 
Publisher Directorate of Knowledge Management in Agriculture
 
Contributor —
 
Date 2011-02-22
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
—
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/4236
 
Source The Indian Journal of Animal Sciences; Vol 76, No 8 (2006)
0367-8318
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/4236/1654
 
Rights Copyright (c) 2014 The Indian Journal of Animal Sciences