Plasma thyroxine and triiodothyronine levels after induction and synchronization of estrus in the anoestrous season in ewes
1997
Gvozdic, D. (Faculty of Veterinary Medicine, Belgrade (Yugoslavia). Department of Pathophysiology) | Stojic, V. (Faculty of Veterinary Medicine, Belgrade (Yugoslavia). Department of Physiology)
The thyroid hormonal status of ewes after induction and synchronization of estrus in the anoestrous season was investigated by determining of plasma triiodothyronine (T3) and thyroxine (T4) concentrations using radioimmunoassay (RIA). Samples of jugular venous plasma were collected on the day of sponge insertion (P), at estrus (day 0) as well as 7, 14 and 18 days after estrus. Plasma T3 and T4 levels in the control group of anoestrous ewes were significantly higher than those in the ewes after synchronization of estrus, except, for the level of T3 on days 14. and 18. after estrus, and T4 on the day of sponge insertion.
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