Factors influencing the accuracy of sonographic fetal weight estimation: a review / 中华围产医学杂志

ABSTRACT

It's an essential part of delivery management for obstetricians to estimate fetal weight accurately.Nowadays,the two-dimensional ultrasonography is a main method to estimate fetal weight,but the sonographic estimated fetal weight (SEFW) is not accurate enough.Therefore,assessing the influencing factors in the accuracy of SEFW,decreasing the error of SEFW,and promoting the accuracy of SEFW,are important aspects for delivery decisions.In this article,papers on factors affecting the SEFW accuracy were reviewed.Our study shows that formulae containing three to four parameters were more accurate than those of one parameter or two.Ethnics,regions,the time interval between ultrasonic examination and delivery,birth weight,fetal gender and seniority of sonographers are influencing factors on SEFW.However,whether fetal position,the volume of amniotic fluid,maternal body mass index,and maternal diabetes have influence on SEFW,are controversial.