Sabbagha R E, Turner J H, Chez R A
Am J Obstet Gynecol. 1975 Feb 1;121(3):371-4. doi: 10.1016/0002-9378(75)90014-9.
Serial sonar fetal cephalometry was performed on 67 pregnant monkeys (Macaca ulatta) with known breeding dates. A normal biparietal diameter (BPD) growth curve was constructed along four percentile divisions; namely, the 10th to the 24th, 25th to the 49th, 50th to the 74th, and the 75th to the 90th. It is shown that under normal conditions fetuses initially positioned in any one of these divisions will continue to grow within the confines of that same percentile range. This biologic phenomenon has not been previously reported. It is significant because it leads to a more precise separation of normal vs. suboptimal intrauterine growth.
对67只已知受孕日期的怀孕猕猴（恒河猴）进行了系列超声胎儿头测量。沿四个百分位数区间构建了正常双顶径（BPD）生长曲线；即第10至24、第25至49、第50至74以及第75至90百分位数区间。结果显示，在正常情况下，最初处于这些区间中任何一个区间的胎儿将继续在同一百分位数范围内生长。这一生物学现象此前未见报道。其意义重大，因为它能更精确地区分正常与次优的宫内生长情况。
