Munsick R A
Am J Obstet Gynecol. 1987 Jan;156(1):183-5. doi: 10.1016/0002-9378(87)90234-1.
Foot, leg, and arm measurements were compared from 599 electively aborted fetuses of Negro and Caucasian women who had reliable menstrual dates and agreement between dates and uterine size. When compared by week, no significant racial differences were detected in the means of any of these measurements between 9 and 20 menstrual weeks of pregnancy. The combined, corrected data provided smoother curves than those previously published. The following formulas are recommended for weeks 9 to 20 of pregnancy, where W = weeks and F, L, and A are the foot, leg, and arm measurements in centimeters: W = 4.5261 + 11.937(F) - 4.4895(F2) + 0.71583(F3); W = 5.9957 + 5.7279(L) - 1.2246(L2) + 0.11880(L3); W = 5.4007 + 5.0305(A) - 0.93540(A2) + 0.079022(A3).
对599例有可靠月经日期且日期与子宫大小相符的黑人和白人女性选择性流产胎儿的足部、腿部和手臂测量数据进行了比较。按孕周比较时，在妊娠9至20个月经周之间，这些测量值的均值未发现明显的种族差异。合并校正后的数据提供了比以前发表的更平滑的曲线。对于妊娠9至20周，推荐以下公式，其中W =孕周，F、L和A分别是足部、腿部和手臂的测量值（单位：厘米）：W = 4.5261 + 11.937(F) - 4.4895(F²) + 0.71583(F³)；W = 5.9957 + 5.7279(L) - 1.2246(L²) + 0.11880(L³)；W = 5.4007 + 5.0305(A) - 0.93540(A²) + 0.079022(A³)。
