Sivan Y, Merlob P, Reisner S H
J Med Genet. 1983 Apr;20(2):130-1. doi: 10.1136/jmg.20.2.130.
In order to define standards for philtrum length and mouth width in the newborn infant, 198 term and preterm infants (27 to 41 gestational weeks) were examined. In every case the gestational age was determined chronologically and clinically and the philtrum length and mouth width (oral intercommissural distance) were measured by two observers using standard measurement techniques. Normal values are presented by plotting the mean +/- 2 SD for each gestational week versus the gestational age.
为了确定新生儿人中长度和口宽的标准，对198名足月儿和早产儿（孕龄27至41周）进行了检查。在每种情况下，通过按时间顺序和临床方法确定孕龄，并由两名观察者使用标准测量技术测量人中长度和口宽（口角间距离）。通过绘制每个孕周的平均值±2标准差与孕龄的关系图来呈现正常值。
