| Abstract: | Assessment of gestational age is one of the most important aims of ultrasonography in obstetrics. As pregnancy progresses, influences of factors which makes the growth of the fetuses different, cumulates. It has been revealed that the earlier in pregnancy ultrasound examination was performed, the better precision in the assessment of gestational age was obtained. The best precision is encountered when Crown-rump length is measured between 7-9 weeks of gestation. Until the end of the half of pregnancy, biparietal measurement allows for better assessment of gestational age than the date of the last menstrual period. As pregnancy progresses the variability of the measurements increases, reaching 7 week variation at term. The aim of this study is the assessment of fetal sacral length ultrasonographic measurements in the calculation of gestational age. The investigated group consists of 453 pregnant women between 16-41 weeks of physiological gestation. |
