Study on the thyroid function of male and female thoroughbred horses in different times after winning races at the hippodrome Cidade Jardim, with the use of “in vitro” 125I-T4 and 125l-T3 tests

Abstract

The author has studied nine animals, five females and four males, observing also data on age, weight, pulse, breathing and temperature taken before and after the race, besides the values of T₃ and T₄ Tests of the sera collected 30, 60, 90 and 120 minutes after the event. We have performed variance and regression analysis for the results of T₃ and T₄ Tests obtained from this group. For T₃ Test significance was found as to sex, along with linear regression, with the same results for T₄ Test without linear regression. We have added the data relative to T₃ Test of this group with those obtained from sera of male and female horses, in repose and after activity, to the values obtained from females over 90 days pregnant verifying statistical significance through variance analysis. With the help of Tukey’s test, we have noticed, in this case, differences among the three groups. The data referring to T₄ Test of sera of male and female horses after winning a race, in repose, after activity, with data obtained from females over 90 days pregnant showed statistical significance by variance analysis. Using Tukey’s test in the four groups, we found that only the horses in repose group differed from the others.