[Body condition and frequency of ovarian cysts in Brown Swiss cows during the first 40 days of lactation].
For this investigation 50 Brown Swiss cows from 21 different farms were used. Twenty-five peripartal overconditioned cows (back fat thickness > 38 mm) were compared with 25 peripartal not overconditioned animals (back fat thickness < 38 mm). On days 20, 30 and 40 post partum the ovaries were examined sonographically and 10, 15, 20, 30 and 40 days after calving plasma concentrations of progesterone and 17-beta estradiol were determined. In peripartal overconditioned animals 12 ovarian cysts were found while only one cyst was present in not overconditioned cows (P < 0.05). At first examination all ovarian cysts were classified by ultrasound as follicle theca cysts (progesterone < 0.5 ng/ml plasma). Follow examinations resulted in 3 cysts which persisted as theca cysts while 8 cysts became luteinized and 2 cysts completely regressed. There was no indication of increased plasma progesterone and/or estradiol concentrations in overconditioned cows with higher fat deposit before of ovarian cysts had occurred.
Hasler
M
M
Klinik für Fortpflanzungsmedizin der Universität Zürich. martin_hasler@bluewin.ch
Eigenmann
U
U
Janett
F
F
Thun
R
R
D000273:Adipose Tissue / Q000378:metabolism; D000818:Animals; D001823:Body Composition / Q000502:physiology*; D001824:Body Constitution / Q000502:physiology; D002417:Cattle / Q000502:physiology*; D002418:Cattle Diseases / Q000097:blood / Q000000981:diagnostic imaging / Q000453:epidemiology*; D004958:Estradiol / Q000097:blood; D005260:Female; D007774:Lactation; D010048:Ovarian Cysts / Q000097:blood / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000662:veterinary*; D010053:Ovary / Q000000981:diagnostic imaging; D049590:Postpartum Period / Q000502:physiology; D011374:Progesterone / Q000097:blood; D013557:Switzerland / Q000453:epidemiology; D014463:Ultrasonography
D011374:Progesterone; D004958:Estradiol