胎儿小脑直径( mm)小脑直径孕周小脑直径孕周14 15.2 35 29.4 15 15.8 36 30.0 16 16.5 37 30.6 17 17.2 38 31.2 18 17.9 39 31.8 19 18.6 40 32.3 20 19.3 41 32.8 21 20.0 42 33.4 22 20.7 43 33.9 23 21.4 44 34.4 24 22.1 45 34.8 25 22.8 46 35.3 26 23.5 47 35.7 27 24.2 48 36.1 28 24.9 49 36.5 29 25.5 50 36.8 30 26.2 51 37.2 31 26.9 52 37.5 32 27.5 54 38.0 33 28.1 55 38.3 34 28.8 56 38.5 Hill LM et al. Obstet Gynecol 1990, 75:981. 胎儿脐动脉血流A/B 10% 50% 90% 16 3.01 4.25 6.07 20 3.16 4.04 5.24 24 2.7 3.5 4.75 28 2.41 3.02 3.97 30 2.43 3.04 3.8 32 2.27 2.73 3.57 34 2.08 2.52 3.41 36 1.96 2.35 3.15 38 1.89 2.24 3.1 40 1.88 2.22 2.68 41 1.93 2.21 2.55 42 1.91 2.51 3.21 Fogarty P, et al. Continuous wave Doppler flow velocith wave forms from the umbilical artery in normal pregnancy.J Perinat Med. 18: 51-54. 大脑中动脉搏动指数孕周5th 50th 95th20-21 1.30 2.10 2.90 22 1.35 2.15 2.95 23-27 1.40 2.20 3.00 28 1.40 2.25 3.05 29-30 1.35 2.20 3.00 31 1.35 2.05 2.95 32 1.30 2.05 2.90 33 1.25 2.05 2.80 34 1.15 1.95 2.75 35 1.10 1.90 2.70 36 1.00 1.80 2.60 37 0.95 1.75 2.55 38 0.80 1.60 2.40 39 0.75 1.55 2.30 40 0.60 1.40 2.20 胎儿肾脏大小( mm)孕周长宽厚体积 cm320 21(15-26)11(7-15)10(6-13)1.1 22 24(19-29)12(8-16)11(7-15)1.7 24 28(22-33)14(10-18)13(9-17)2.5 26 31(25-26)16(12-19)15( 11-19)3.5 28 33(28-38)17(13-21)16(12-16)4.7 30 36(31-41)19(15-23)18(14-22)6.1 32 38(33-43)20(17-24)19(15-23)7.5 34 40(35-45)22(18-26)20(16-24)9.0 36 41(36-47)23(19-27)21(17-25)10.2 38 43(37-48)23(19-27)21(18-26)11.2 40 44(38-49)23(19-27)23(19-27)14.0 胎儿肾血流参数右肾动脉左肾动脉近端远端近端远端PI 2.33(0.46)2.34(0.43)2.36(0.48)2.47(0.41)RI 0.91(0.05)0.92(0.05)0.92(0.05)0.93(0.04...