Records of 208 cats determined to have endometritis – pyometra complex (EPC) were studied. It was noted that more often old females (5 years and more) suffered, mean age was 5, 5 years. In young animals (≤2 years) the predisposing factor was previous hormonal contraception. The most common clinical symptom in affected cats was pathological vaginal discharege, which was noted in 180 cases (86, 54%). General symptoms (eg. depression, partial to complete anorexia, polydipsia, vomiting, pyrexia) apeared in 47 cats (22, 59%). It was noted relatively rare incidence of EPC in autum – winter months (from october to december) –this finding shows for dependence between EPC incidence and sexual activity of female cats.

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