In the study, the relationship of follicular growth waves, oestradiol and pregnancy rates were investigated during oestrus cycle in cows. A total of 22, Brown Swiss cows (3-5 years old) were used for the study. The ovaries of animals were examined from sixth day of cycle to next oestrus by ultrasound. The follicles that were present in the ovarium were recorded. Follicular growth was observed every day by means of ultrasound examination. The blood samples were taken for analysis of oestradiol simultaneously with ultrasound examinations. The oestrus animals were inseminated. Each animal that inseminated was examined by ultrasound on day 28 after insemination for pregnancy diagnosis. Two follicular growth waves were observed in nine of 22 (40.9%), three waves in 13 of 22 (59.1%) animals. The oestradiol was found in the same concentration but in different release patterns between two and three waves animals. Pregnancy rate in cows with three and two follicular waves did not differ. In conclusion, emergence of three waves of follicular growth was higher in Brown Swiss cows, the analysis of oestradiol could be used for determination of the wave numbers and the animals with different waves may have had the same pregnancy rates.
ZusammenfassungEs wird erstmals über die klinische Symptomatik, Diagnostik und Therapie der angeborenen Vulvahypoplasie bei einem Alpakafohlen in Deutschland berichtet. Das Cria war bei Aufnahme in die Klinik 24 Stunden alt und zeigte ein gestörtes Allgemeinbefinden und Kolik. Die Hypoplasie der Vulva führte zu einer Harnabsatzstörung, was Sekundärkomplikationen in Form einer Urovagina mit Harnstau bis in die Nierenbecken bedingte. Durch chirurgische Korrektur der Rima vulvae konnte das Tier geheilt werden. Da diese Erkrankung in den letzten Jahren in der Literatur vermehrt beschrieben wird, ist damit zu rechnen, dass die kongenitale Vulvahypoplasie beim Alpaka ein zunehmendes zuchthygienisches Problem darstellt.
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