Rosati P, Exacoustos C, Puggioni G F
Istituto di Clinica Ostetrica e Ginecologica, Università Cattolica del S. Cuore, Roma.
Minerva Ginecol. 1995 Apr;47(4):127-31.
The aim of this study was to describe the normal range for the measurement of sonographic fetal parameters in our population, analyzed growth trend in different periods of pregnancy and establish the optimal time interval between scans. The study was performed in 2336 normal pregnant women between 14-40 weeks of gestation. Polynomial regression analysis was used to describe growth curves. A persistent increment of all ultrasonographic parameters throughout pregnancy was observed with a very high correlation with gestational age. A flattening of growth curves was observed after the 30th week of gestation for cephalic parameters and after the 28th week for the other parameters, particularly for fetal limb measurements. Considering inter- and intra-operator error and the physiological weekly increment, a correct growth evaluation of single parameters requires at last a two weeks time span from the last scan performed. Only the biparietal diameter and femur length allow a correct growth evaluation weekly, before the 30th week and the 28th week, respectively.
本研究的目的是描述我们人群中超声测量胎儿参数的正常范围，分析孕期不同阶段的生长趋势，并确定扫描之间的最佳时间间隔。该研究在2336名妊娠14至40周的正常孕妇中进行。采用多项式回归分析来描述生长曲线。观察到整个孕期所有超声参数持续增加，且与孕周高度相关。孕周30周后头部参数的生长曲线变平，其他参数在孕周28周后变平，尤其是胎儿肢体测量值。考虑到操作者之间和操作者内部的误差以及每周的生理增长，对单个参数进行正确的生长评估至少需要距离上次扫描两周的时间跨度。只有双顶径和股骨长度分别在孕周30周和28周之前允许每周进行正确的生长评估。
