Ovarian follicular wave characteristics in alpacas

Vaughan, JL, Macmillan, KL and D'Occhio, MJ (2004) Ovarian follicular wave characteristics in alpacas. Animal Reproduction Science, 80 3-4: 353-361. doi:10.1016/j.anireprosci.2003.08.002

Author Vaughan, JL
Macmillan, KL
D'Occhio, MJ
Title Ovarian follicular wave characteristics in alpacas
Journal name Animal Reproduction Science   Check publisher's open access policy
ISSN 0378-4320
Publication date 2004
Sub-type Article (original research)
DOI 10.1016/j.anireprosci.2003.08.002
Open Access Status
Volume 80
Issue 3-4
Start page 353
End page 361
Total pages 9
Place of publication Amsterdam
Publisher Elsevier Science Bv
Language eng
Abstract The objectives were to describe in detail ovarian follicular growth characteristics and to establish the interval between successive large follicles in unmated alpacas. The ovarian follicular status of 16 non-pregnant, non-lactating mature alpacas was recorded using ultrasound every second day for between 46 and 100 days. An inverse relationship was observed between the diameter of the largest follicle and the total number of follicles indicating that follicular growth in alpacas occurs in waves. There were 15/38 (39%) inter-wave intervals of 12 days and 12/38 (32%) intervals of 16 days. The maximum follicular diameter in each follicular wave was 8.8+/-0.3 mm (n = 38). Inter-wave intervals of longer duration were associated with a larger maximum follicle diameter (P < 0.001). However, the growth rate of dominant follicles was consistent over the first 10 days after emergence. They reached a diameter capable of ovulation by this time, regardless of subsequent inter-wave interval. The latter observation suggested that the optimal time of mating might be predicted in alpacas, provided that the emergence of ovarian follicular waves was controlled. (C) 2003 Elsevier B.V. All rights reserved.
Keyword Agriculture, Dairy & Animal Science
Reproductive Biology
ovarian follicular waves
inter-wave interval
Llamas Lama-glama
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Agriculture and Food Sciences
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Citation counts: TR Web of Science Citation Count  Cited 22 times in Thomson Reuters Web of Science Article | Citations
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Created: Fri, 25 Jan 2008, 16:06:50 EST