Sabbagha R E, Barton B A, Barton F B, Kingas E, Turner J H
Am J Obstet Gynecol. 1976 Oct 15;126(4):485-90.
Serial BPD readings were obtained from 142 normal parturients, with established dates, between 20 to 40 weeks of pregnancy. It is noted that fetal BPD's can be separated into one of three percentile rankings: large (i.e. above the seventy-fifth percentile), average (i.e. twenty-fifth to seventy-fifth percentile), and small (i.e. below the twenty-fifth percentile). In addition, it is shown that, under normal conditions, fetuses intially placed in any one of these cephalic levels will continue to grow within the confines of the same percentile range. This biologic phenomenon has not been previously reported in human fetal growth. It is important because it leads to a closer prediction of fetal age and a better assessment of neonatal weight and outcome.
对142名预产期确定的正常产妇在妊娠20至40周期间进行了连续双顶径（BPD）测量。值得注意的是，胎儿双顶径可分为三个百分位数等级之一：大（即高于第75百分位数）、平均（即第25至第75百分位数）和小（即低于第25百分位数）。此外，研究表明，在正常情况下，最初处于这些头围水平中任何一个的胎儿将继续在相同的百分位数范围内生长。这种生物学现象以前在人类胎儿生长中尚未有报道。它很重要，因为它能更精确地预测胎儿年龄，并更好地评估新生儿体重和结局。
