Munsick R A
Am J Obstet Gynecol. 1984 Aug 15;149(8):883-7. doi: 10.1016/0002-9378(84)90609-4.
Fetal arm, leg, and foot lengths were freshly measured with vernier calipers on all fetuses aborted by me from 1975 to 1983. With the use of these measurements from the 575 patients with reliable menstrual or conception dates and uterine size in agreement (+/- 2 weeks) with dates, statistical analyses were performed to determine the polynomial regressions of menstrual weeks of pregnancy for each extremity length. The data best fit the following formulas, where W represents weeks and F, L, and A are foot, leg, and arm lengths in centimeters: W = 3.03 + 17.4(F) - 10.8 (F2) + 3.36(F3) - 0.367(F4); W = 5.74 + 6.49(L) - 1.90(L2) + 0.305(L3) - 0.0161(L4); W = 5.19 + 5.65(A) - 1.45(A2) + 0.203(A3) - 0.00934(A4). Mean foot lengths at each week agreed well with those of Streeter, and when corrected for bias, all foot lengths were in near perfect agreement with his data.
1975年至1983年期间，我对所有人工流产胎儿的手臂、腿部和足部长度用游标卡尺进行了新鲜测量。利用575例月经或受孕日期可靠且子宫大小与日期相符（±2周）患者的这些测量数据，进行了统计分析，以确定每个肢体长度对应的妊娠月经周数的多项式回归。数据最符合以下公式，其中W代表周数，F、L和A分别代表足部、腿部和手臂长度，单位为厘米：W = 3.03 + 17.4(F) - 10.8 (F2) + 3.36(F3) - 0.367(F4)；W = 5.74 + 6.49(L) - 1.90(L2) + 0.305(L3) - 0.0161(L4)；W = 5.19 + 5.65(A) - 1.45(A2) + 0.203(A3) - 0.00934(A4)。每周的平均足部长度与斯特里特的数据吻合良好，经偏差校正后，所有足部长度与他的数据几乎完全一致。
