Use of ultrasonography exams to determinate the parturition day by Yorkshire canine breed

Abstract

The purpose of this study was verify the efficacy of ultrasonography to determinate the parturition
day by Yorkshire canine breed also to determinate a measures pattern embryonic vesicle diameter crown rump
lenght biparietal diameter body diameter torax diameter abdomen diameter and femur length and also to
establish the linear regression formula to be used by veterinarians for this breed. The length of pregnancy from
the date of the first mated to the first parturition signs resulted in 63,57 days. So to predict the date of parturition
was used a multiple linear regression analyses. It was possible determinate a formula to predict the date of
parturition utilizing crown-rump length, biparietal diameter and femur length obtained a major correlation
(R 0,998).