Comparison of various examination methods used in ovarial diagnostic in cows

In this study diagnostic certainty of ultrasonography and rectal palpation concerning the detection of follicles and C.I. was compared by evaluation o f the findings obtained with ultrasonography in waterbath and dissection of the ovaries after slaughter. Clinical examinations were performed on a total of 30 cows (transrectally a nd ultrasonographically, 5,0 mhz, linear) in slaughterhouse. In the laborat ory ovaries were evaluated after slaughter both macroscopically and by ultr asonography in waterbath. Diagnostic reliabilities of these methods were co mpared. No difference between the methods was determined concerning the lon gitudinal measurements of corpora lutea (19,96 +/- 4,83 mm, 20,41 +/- 5,41 mm, 21,45 +/- 5,26 mm by ultrasonography, waterbath and macroscopy respecti vely). By means of determining the correct identification of corpora lutea, the error rate was 24,1 % and 17,2 % for rectal palpation and ultrasonogra phy respectively. The comparison of rectal palpation and macroscopy showed that three small corpora lutea and two corpora lutea with small cavity were determined wrongly as small follicles and two corpora lutea were determine d whereas they were not present actually. With ultrasonography four small C .I. could not be detected and one C.I. with cavity was wrongly determined a s follicle. It was noticed that follicles bigger than 10 mm (F2=10-15 mm, F 3=16-20 mm) could be determined more accurately by means of ultrasonography than by rectal palpation (with ultrasonography: F2=90,48 %, F3=100,0 %; wi th rectal palpation, F2=61,9 %, F3=200,0 %). The correlation of the findings of rectal palpation or ultrasonography and blood progesterone levels was 86,2 % and 89,7 % respectively. This accordan ce was 96,6 % for progesterone levels and waterbath and macroscopic finding s.