Title:Az életkor, a kondíció és a vemhesség hatása a nóri (Noriker) kancák egyes hormonális, biokémiai és hematológiai értékeire
SUMMARY Background: Many haematological, biochemical and endocrine parameters may vary depending on breed, sex, age, reproductive status, body condition score, type of load, nutrition and welfare. Objectives: The aim of our study was to analyse the influence of age, body condition and reproductive state on selected biochemical, haematological and endocrine parameters in mares of Norik breed. Materials and Methods: The research was conducted on 22 broodmares of Norik breed. The mares were classified according to the age, reproductive state and body condition into 6 groups (group A:– from 5 to 10 years of age (n = 6), group B: from 11 to 17 years of age (n = 16), group C: mares in the second trimester of pregnancy (n = 11), group D: non-pregnant mares (n = 11), group E: mares with optimal weight (n = 16), group F: overweight mares (n = 6). Results and Discussion: It seems that the body condition is a more objective system of evaluating the selected biochemical, haematological and endocrine parameters in mares as compared to the criterion of age and pregnancy. As compared group E to group F, significant differences were found in IGF-1 (p ≤ 0,17), glucose (p < 0,01), urea (p < 0,05), albumin (p ≤ 0,1), creatinine (p ≤ 0,08 ), AST (p ≤ 0,1), GMT (p ≤ 0,18), LDH (p ≤ 0,09), total cholesterol (p ≤ 0,12), iron (p < 0,05), chlorine (p < 0,05), RBC (p ≤ 0,1) and Hb (p ≤ 0,14). For this reason, in case of the assessment of a very heterogeneous group of horses, we can hypothesized that the mares should be divided according their BCS when the evaluation of biochemical, haematological and hormonal parameters is performed.