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Báo cáo khoa học: "Time of initial detection of fetal and extra-fetal structures by ultrasonographic examination in Miniature Schnauzer bitches"

Tuyển tập các báo cáo nghiên cứu khoa học quốc tế về bệnh thú y đề tài: Time of initial detection of fetal and extra-fetal structures by ultrasonographic examination in Miniature Schnauzer bitches | J. Vet. Sci. 2007 8 3 289-293 JOURNAL OF Veterinary Science Time of initial detection of fetal and extra-fetal structures by ultrasonographic examination in Miniature Schnauzer bitches Bang-Sil Kim Chang-Ho Son College of Veterinary Medicine Chonnam National University Gwangju 500-757 Korea Serial ultrasonographic examinations were performed daily on 9 Miniature Schnauzer bitches from the 15th day of gestation until parturition to determine the time the gestational structures were first detected. The gestational age was timed from the day of ovulation day 0 which was estimated to occur when the plasma progesterone concentration was 4.0 ng ml. The gestational length in 9 Miniature Schnauzer bitches was found to be 63.0 1.7 range 61-65 days. The initial detection of the fetal and extra-fetal structures were as follows gestational sac at day 18.0 0.9 17-19 zonary placenta in the uterine wall at day 24.9 1.1 23-26 yolk sac membrane at day 25.0 0.9 24-26 amnionic membrane at day 27.7 1.0 2629 embryo initial detection at day 22.6 0.5 22-23 heartbeat at day 23.4 0.5 23-24 fetal movement at day 32.5 0.8 32-34 stomach at day 31.2 1.6 29-33 urinary bladder at day 32.6 1.8 31-35 skeleton at day 34.9 1.6 34-38 and kidney at day 42.2 0.7 41-43 . Key words gestational structures Miniature Schnauzer bitches ultrasonography Introduction The early determination of pregnancy and the gestational age are important for reproductive management in small animal practices. In addition predicting the parturition date can help in managing parturition or planning a Cesarean section in pregnant bitches with multiple mating or an unknown mating time 12 Ultrasonography is a useful imaging modality for determining pregnancy 4 7 13 estimating the litter size 5 13 fetal development 14 18 uterine examination after parturition 16 a reproductive examination and the dfrect detection of ovulation 1 In veterinary medicine estimation of the gestational age based on the anatomic appearance and predicting .