The objective of study was to derive specific growth curves of ICC and BP for Maine Coon. Twenty-three pregnant queens aged 1-6 years, with body weight of 4.5-7.6 kg, were included in the study. In each queen, serial ultrasonographic examinations of pregnancy were performed through the abdomen with the MyLab Gold Vet scanner with a 6.6-7.5 MHz microconvex probe (Turin, Italy). ICC or BP was measured, depending on the stage of pregnancy. Each examination was regarded as a separate observation. In 18 queens, ICC was measured 33 times, and in 21 queens, BP was measured 60 times. The linear regressions of specific models of ICC and BP in Maine Coon pregnancies and specific formulas for predicting the parturition date in this breed were derived. The ICC formula was: days before parturition (DBP) = -0.79 * mm + 57.9, and the BP formula was: DBP = -1.86 * mm + 49.3. The proposed fetometric formulas of ICC and BP for Maine Coons after application in clinical patients can improve obstetric management in this breed.
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