The work reviews the possibility of using thromboelastogram to assess the coagulation potential in horses. The experiment engaged ten clinically healthy mares aged from one to five years and five newborn foals up to ten days of Russian trotting breed. The thromboelastogram was recorded in citrated blood by means of a two-channel computerized Coagulation Analyzer (TEG® 5000 - Hemoscope, USA) and applied diagnostic program. Such parameters as R (min), K (min), Ang (°), MA (mm) were taken into consideration; no significant difference was found in parameters between mares and foals.