Canine pregnancy examination by ultrasonography
1995
Sudson Sirivaidyapong (Chulalongkorn Univ., Bangkok (Thailand). Faculty of Veterinary Scinece. Dept. of Obstetrics, Gynaecology and Reproduction)
B-mode, Real-Time Ultrasound with 5 MHz Linear Array Transducer were used for pregnancy examination. Twenty five female dogs with different gestation period were examined. During early gestation period (19-29 days), round or oval embryonic vesicles with embryo in embryonic fluid were seen. Embryonic heart activity was detected at about 21-22 days of gestation and was seen easily in the middle and late gestation. At 30-35 days of gestation, the embryo developed hypoechoic head and body with embryonic movement. After 36 days of gestation the hyperechoic skeleton, hypoechoic organs and embryonic activities can be clearly identified.
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