孕周 双顶径平均值（cm） 腹围平均值（cm） 股骨长（cm） 13 2.52+0.25 6.90+1.65 1.17+0.31 14 2.83+0.51 7.77+1.82 1.74+0.58 15 3.23+0.51 9.13+1.56 1.74+0.58 16 3.62+0.58 10.32+1.92 2.10+0.51 17 3.97+0.44 11.49+1.62 2.52+0.44 18 4.25+0.53 12.41+1.89 2.71+0.46 19 4.52+0.53 13.59+2.30 3.03+0.50 20 4.88+0.58 14.80+1.89 3.35+0.47 21 5.22+0.42 15.62+1.84 3.64+0.40 22 5.45+0.57 16.70+2.23 3.82+0.47 23 5.80+0.44 17.90+1.85 4.21+0.41 24 6.05+0.50 18.74+2.23 4.36+0.51 25 6.39+0.70 19.64+2.20 4.65+0.42 26 6.68+0.61 21.62+2.30 4.87+0.41 27 6.98+0.57 21.81+2.12 5.10+0.41 28 7.24+0.65 22.86+2.14 5.35+0.55 29 7.50+0.65 23.71+1.50 5.61+0.44 30 7.83+0.62 24.88+2.03 5.77+0.47 31 8.06+0.60 25.78+2.32 6.03+0.38 32 8.17+0.65 26.20+0.33 6.43+0.49 33 8.50+0.47 27.78+2.30 6.52+0.46 34 8.61+0.63 27.99+2.55 6.62+0.43 35 8.70+0.55 28.74+2.88 6.71+0.45 36 8.81+0.57 29.44+2.83 6.95+0.47 37 9.00+0.63 30.14+2.17 7.10+0.52 38 9.08+0.59 30.63+2.83 7.20+0.43 39 9.21+0.59 31.34+3.12 7.34+0.53 40 9.28+0.50 31.49+2.79 7.40+0.53 |
