胎儿双顶径、股骨长及头围腹围参照表[资料]
表1 正常妊娠胎头双顶径值(cm)
孕周 均值?
标准
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差 孕周 均值?标准差
11 2.08?0.577 26 6.31?0.773
12 2.35?0.525 27 6.67?0.820
13 2.58?0.515 28 7.09?0.403
14 3.03?0.757 29 7.23?0.682
15 3.45?0.580 30 7.39?0.802
16 3.79?0.358 31 7.93?0.636 17 4.10?0.820 32 7.94?0.580 18 4.28?0.406 33 8.13?0.367 19 4.26?0.630 34 8.30?0.628 20 4.68?0.711 35 8.47?0.614 21 4.79?0.681 36 8.52?0.515 22 5.15?0.568 37 8.71?0.566 23 5.47?1.000 38 8.88?0.354 24 5.80?0.704 39 8.91?0.536 25 5.81?1.380 40 9.09?0.429
表2 头围(HC)及腹围(AC)的正常均值(cm) 孕周 HC AC 孕周 HC AC 12 7.0 5.6 27 25.2 22.9 13 8.9 6.9 28 26.2 24.0 14 9.8 8.1 29 27.1 25.0 15 11.1 9.3 30 28.0 26.0 16 12.4 10.5 31 28.9 27.0
17 13.7 11.7 32 29.7 28.0 18 15.0 12.9 33 30.4 29.0 19 16.3 14.1 34 31.2 30.0 20 17.5 15.2 35 31.8 30.9 21 18.7 16.4 36 32.5 31.8 22 19.9 17.5 37 33.0 32.7 23 21.0 18.6 38 33.6 33.6 24 22.1 19.7 39 34.1 34.5 25 23.2 20.8 40 34.5 35.4 26 24.2 21.9
表3 股骨长度正常值(cm)
孕周 股骨长度 孕周 股骨长度 孕周 股骨长度 12 0.8 22 3.9 32 6.3 13 1.1 23 4.2 33 6.5 14 1.5 24 4.4 34 6.6 15 1.8 25 4.7 35 6.8 16 2.1 26 4.9 36 7.0
17 2.4 27 5.2 37 7.2 18 2.7 28 5.4 38 7.3 19 3.0 29 5.6 39 7.5 20 3.3 30 5.8 40 7.6 21 3.6 31 6.1