原文: The first report on the use of ultrasonography in pregnantcatswas already published in 1980 (Mailhac et al 1980). Detailed descriptions of B-mode ultrasonographic pic...
原文: The first report on the use of ultrasonography in pregnantcatswas already published in 1980 (Mailhac et al 1980). Detailed descriptions of B-mode ultrasonographic pictures of the pregnant feline utems have been reported, both for the first (Zambelli et al 2002) and second half of gestation. The earliest ultrasonographic observation of a gestational sac was on day 10 after mating (with a 10MHz transducer), while the embryo proper could be visualized from day 18 on wards (Fig. 3.28). Davidson et al (1986) were the first to report the use of ultrasonography for pregnancy diagnosis. Fetal cardiac activity can be detected from day 16-17 onwards to assess fetal viability (Root Kustritz 200Gb).
Veterinary Reproduction and Obstetrics 9th Edition P117