[Sonographic presentation of the physiologic ovarian function in the anovulatory and pseudopregnant cycle of the cat].
Continuous sonographic examinations of the physiological ovarian structures were performed in four anovulatory and 14 pseudopregnant cycles. The animals were examined in standing position from the right and left flank using a mechanical 13 MHz sector scanner with integrated stand off pad. The intervals were two or three days during anoestrous and luteal phases and one day during follicular phases. The follicles could be identified from a minimum size of 1.0 mm and reached maximum mean diameters of 3.3 mm within at most eight days. The period of follicular regression was eight days in the anovulatory cycles. In the pseudopregnant cycles ovulation could be sonographically verified by the disappearance of follicles of 3 or more mm in diameter within 24 hours. Immediately thereafter the ovary had a more or less homogeneous appearance. Luteal development gave different sonographic findings. In general anechoic structures of 1 mm in diameter were recognizable within three days after ovulation, coming up to 5.3 mm within five days. Compact corpora lutea were easily identified as nearly homogeneous structures, that bulged over the ovarian surface. Corpora lutea, that were embedded in the ovary could not be detected without doubt.
Institut für Reproduktionsmedizin der Tierärztlichen Hochschule Hannover.
A R
AR
Günzel-Apel
R
R
Kawauchi
C P
CP
Nautrup
H J
HJ
Hedrich
D000780:Anestrus / Q000502:physiology; D000818:Animals; D000858:Anovulation / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000662:veterinary*; D002371:Cat Diseases / Q000000981:diagnostic imaging* / Q000503:physiopathology; D002415:Cats; D003338:Corpus Luteum / Q000000981:diagnostic imaging / Q000502:physiology; D005260:Female; D005498:Follicular Phase / Q000502:physiology; D008183:Luteal Phase / Q000502:physiology; D006080:Ovarian Follicle / Q000000981:diagnostic imaging / Q000502:physiology; D010053:Ovary / Q000000981:diagnostic imaging* / Q000502:physiology; D010060:Ovulation / Q000502:physiology; D011555:Pseudopregnancy / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000662:veterinary*; D014463:Ultrasonography