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OJVRTM
Online
Journal of Veterinary Research©
Volume
20(12):768-772, 2016.
Effect of castration on serum thyroid hormones in horses.
Saman Taravat *,
Aboutorab Tabatabei-Naeini,
Saeed Nazifi, Alireza Raayat-Jahromi, Seyedeh Pantea Rahnama
Department
of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz,
Iran.
ABSTRACT
Taravat S, Tabatabei-Naeini
A, Nazifi S, Raayat-Jahromi
A, Rahnama SP., Effect of castration on serum thyroid
hormones in horses, Onl J Vet Res., 20(12):768-772, 2016.
Castration may affect thyroid, hypothalamus and adrenal glands. Effect of
castration on thyroid hormones levels in 12 mixed breed horses is
described. Closed technique to remove
testicles was performed under general anesthesia. Blood samples were collected
before surgery, 10 and 30 days after for determination of changes in blood T4,
T3, FT3 and FT4 concentrations. A paired t-test was used to determine changes
between pre and post-operative thyroid levels. No significant (P > 0.05) changes were found in any thyroid hormone
value before, 10 or 30 days after castration. Findings suggested that in this study there was no relationship
between castration and thyroid hormone levels after 30 days. Changes in thyroid hormones after
castration in horses may take longer than a month to appear.
Key words:
horses, castration, thyroid hormones.