Real-time ultrasonography for determining the gestational age of ewes.
Seven Swedish peltsheep ewes were examined weekly by transabdominal ultrasound scanning from one-and-a-half to two months of gestation until parturition. By means of a simple regression analysis, the heart rate, the biparietal diameter of the skull and the diameter of the body trunk were correlated with fetal age, and it was concluded that these measurements could be used to estimate the age of the fetus.
Aiumlamai
S
S
Department of Obstetrics and Gynaecology, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, Uppsala.
Fredriksson
G
G
Nilsfors
L
L
D000818:Animals; D005314:Embryonic and Fetal Development; D005260:Female; D005865:Gestational Age; D006340:Heart Rate, Fetal; D011247:Pregnancy; D011258:Pregnancy Tests / Q000662:veterinary; D011270:Pregnancy, Animal / Q000502:physiology*; D012044:Regression Analysis; D012756:Sheep / Q000502:physiology*; D012886:Skull / Q000000981:diagnostic imaging / Q000196:embryology; D016216:Ultrasonography, Prenatal / Q000662:veterinary*