Title of article :
Ultrasonographic screening of the ovulatory process in goats
A. Gonzalez-Bulnes، نويسنده ,
Issue Information :
ماهنامه با شماره پیاپی سال 2004
The objectives of the current trial were to characterize the changes in the ultrasound image of preovulatory follicles at
ovulation in does and to determine the usefulness of ultrasonography in studies involving the evaluation of time of ovulation.
The study involved 12 goats in which oestrus was synchronized with three prostaglandin F2 , cloprostenol injections. Ultrasonographies
were performed every 4 h from 48 h after the third cloprostenol administration. The presence of at least one
preovulatory follicle (mean diameter of 7.8 ± 0.4 mm) was found in all the does at the time of the first scan. In comparison
to other large diameter non-ovulatory follicles, preovulatory follicles had irregular outlines and diffuse and heterogeneous
hypoechogenicity in the antrum, with reverberation artefacts similar to echoic spots and echoic lines in some cases. Occurrence
of follicular evacuation and ovulation may be determined by the disappearance of the follicular antrum. The corpus
haemorrhagicum was found to consist of a heterogeneous structure (mean diameter of 8.6±0.3 mm) with higher echogenicity
compared to the preovulatory follicles. On the basis of disappearance of the preovulatory follicle and visualization of increased
heterogeneous echogenicity in its site, serial ultrasonographic evaluation was found to be useful in establishing the time of
ovulation in goats. However, the similarity in the echoic pattern of the corpus hemorraghicum and the surrounding ovary may
complicate the identification of ovulations in isolated observations.
© 2003 Elsevier B.V. All rights reserved.
goats , Follicular activity , Luteal tissue , ovulation , ultrasonography
Journal title :
Small Ruminant Research