［詞彙表］產科測量

• GA: Gestational Age. 妊娠年齡
• Fetal age: Conceptional age. 胎齡
• EFW: Estimated fetal weight. 胎兒體重估計
• AUA: Arithmetic ultrasound age. 平均胎齡
• DOC: Date of conception. 受孕日
• LMP: Last menstrual period. 最後一次月經
• EDD: Estimated due date. 預產日

早期產科測量

• CRL: Crown-rump length. 頭臀長
• GS: Gestational sac. 妊娠囊直徑
• NT: Nuchal Translucency 頸項透明帶厚度
• IT: Intracranial Translucency 顱內透明帶

中後期產科測量

• AC: Abdominal circumference. 腹圍
• HC: Head circumference. 頭圍
• FL: Femur length. 股骨長
• BPD: Biparietal diameter. 雙頂徑
• AFQ: Amniotic Fluid Quadrants 羊水四象限測量，用於AFI (羊水指數) 計算
  • Q1
  • Q2
  • Q3
  • Q4
• TCD: Transcerebellar Diameter 小腦橫徑
• IOD: Interorbital Distance 內眶距
• OOD: Outer Orbital Distance 外眶距
• CM: Cisterna Magna 小腦池寬度
• TL: Tibia Length 脛骨長度
• FIB: Fibula Length 腓骨長度
• HL: Humerus Length 肱骨長度
• RAD: Radius Length 橈骨長度
• UL: Ulna Length 尺骨長度
• LVD: Lateral Ventricle Diameter 腦室前後距離
• NF: Nuchal Fold Thickness 頸部皺褶厚度
• AF-SDP Amniotic Fluid – Single Deepest Pocket 單口徑羊水深度
• CxL: Cervical Length 子宮頸長度

計算公式

• GS, CRL, BPD, HC, AC, FL GA 數值請參考附錄表
• TCD: GA(Weeks) = 4.9 + 0.5 × TCD(mm)
• TL: GA(Weeks) = 2.7 × TL(cm) + 8.7
• FIB: GA(Weeks) = 2.7 × FIB(cm) + 8.6
• HL: GA(Weeks) = 2.5 × HL(cm) + 9.0
• RAD: GA(Weeks) = 2.6 × RAD(cm) + 9.0
• UL: GA(Weeks) = 2.6 × UL(cm) + 9.2
• EDD = 檢查日 + (40 – GA) 週

參考資料

1. Early OB calculations: Hadlock 1992.
   Fetal Crown-Rump Length: Reevaluation of Relation to Menstrual Age with High-Resolution Real-Time US.
2. Mid-late OB calculations:
   1. Hadlock 1984
      Hadlock F.P, Deter R.L, Harrist R.B. and Park S.K, Estimating fetal age: computer-assisted analysis of multiple fetal growth parameters, Radiology, 152, pp 497-501, 1984
   2. Goldstein 1987, Ultrasound Obstet Gynecol 7:161–165
   3. Chitty 1994, Ultrasound Obstet Gynecol 4:287–296
   4. Jeanty 1984, Radiology 151:417–422
3. EFW equations:
   EFW by AC, BPD FL, and HC: Hadlock 1985
   Hadlock F.P, Harrist R.B, Sharman R.S, Deter R.L, Park S.K, Estimation of fetal weight with the use of head, body, and femur measurements–a prospective study, Am.J.Obstet.Gynecol., 151, pp 333-337, 1985

附錄

CRL （公分）	GA （週）
0.222017	5
0.323257	5.5
0.458221	6
0.633076	6.5
0.853455	7
1.12393	7.5
1.44749	8
1.82517	8.5
2.25575	9
2.73569	9.5
3.25926	10
3.81889	10.5
4.40564	11
5.00986	11.5
5.62178	12
6.23223	12.5
6.83319	13
7.41828	13.5
7.98308	14
8.5254	14.5
9.04534	15
9.54531	15.5
10.03	16
10.5061	16.5
10.9826	17
11.4704	17.5
11.9826	18
12.5346	18.5
13.1446	19
13.8342	19.5

GS（公分）	GA（週）
0.2	4.985714286
0.3	5.114285714
0.4	5.228571429
0.5	5.357142857
0.6	5.485714286
0.7	5.614285714
0.8	5.742857143
0.9	5.871428571
1	5.985714286
1.1	6.114285714
1.2	6.242857143
1.3	6.371428571
1.4	6.5
1.5	6.614285714
1.6	6.742857143
1.7	6.871428571
1.8	7
1.9	7.128571429
2	7.257142857
2.1	7.371428571
2.2	7.5
2.3	7.628571429
2.4	7.757142857
2.5	7.885714286
2.6	8
2.7	8.128571429
2.8	8.257142857
2.9	8.385714286
3	8.514285714

GA （週）	AC （公分）	HC（公分）	FL（公分）
12	4.58288	6.79971	0.7244
12.5	5.26562	7.52234	0.89625
13	5.94338	8.2402	1.0664
13.5	6.61615	8.9531	1.23485
14	7.28392	9.66083	1.4016
14.5	7.9467	10.3632	1.56665
15	8.6045	11.0601	1.73
15.5	9.25731	11.7512	1.89165
16	9.90512	12.4363	2.0516
16.5	10.5479	13.1154	2.20985
17	11.1858	13.7882	2.3664
17.5	11.8186	14.4544	2.52125
18	12.4465	15.114	2.6744
18.5	13.0693	15.7667	2.82585
19	13.6872	16.4123	2.9756
19.5	14.3001	17.0507	3.12365
20	14.908	17.6816	3.27
20.5	15.5109	18.3049	3.41465
21	16.1088	18.9203	3.5576
21.5	16.7017	19.5277	3.69885
22	17.2897	20.1269	3.8384
22.5	17.8726	20.7177	3.97625
23	18.4506	21.2998	4.1124
23.5	19.0235	21.8732	4.24685
24	19.5915	22.4376	4.3796
24.5	20.1545	22.9929	4.51065
25	20.7125	23.5388	4.64
25.5	21.2655	24.0751	4.76765
26	21.8135	24.6016	4.8936
26.5	22.3565	25.1183	5.01785
27	22.8946	25.6248	5.1404
27.5	23.4276	26.121	5.26125
28	23.9557	26.6066	5.3804
28.5	24.4787	27.0816	5.49785
29	24.9968	27.5457	5.6136
29.5	25.5099	27.9987	5.72765
30	26.018	28.4404	5.84
30.5	26.5211	28.8707	5.95065
31	27.0192	29.2893	6.0596
31.5	27.5123	29.696	6.16685
32	28.0005	30.0907	6.2724
32.5	28.4836	30.4732	6.37625
33	28.9618	30.8433	6.4784
33.5	29.4349	31.2007	6.57885
34	29.9031	31.5453	6.6776
34.5	30.3663	31.877	6.77465
35	30.8245	32.1955	6.87
35.5	31.2777	32.5005	6.96365
36	31.7259	32.7921	7.0556
36.5	32.1691	33.0698	7.14585
37	32.6074	33.3336	7.2344
37.5	33.0406	33.5833	7.32125
38	33.4689	33.8186	7.4064
38.5	33.8921	34.0394	7.48985
39	34.3104	34.2455	7.5716
39.5	34.7237	34.4367	7.65165
40	35.132	34.6128	7.73

GA （週）	BPD（公分）
12.5438	1.7
12.9608	1.9
13.3913	2.1
13.8352	2.3
14.2925	2.5
14.7632	2.7
15.2473	2.9
15.7448	3.1
15.9986	3.2
16.5163	3.4
17.0473	3.6
17.5917	3.8
17.869	3.9
18.4336	4.1
19.0115	4.3
19.6029	4.5
19.9036	4.6
20.5151	4.8
21.14	5
21.4575	5.1
22.1025	5.3
22.7609	5.5
23.0951	5.6
23.7737	5.8
24.118	5.9
24.8166	6.1
25.1709	6.2
25.8897	6.4
26.2541	6.5
26.993	6.7
27.3674	6.8
27.7452	6.9
28.5109	7.1
28.8988	7.2
29.29	7.3
30.0825	7.5
30.4838	7.6
30.8884	7.7
31.2964	7.8
31.7077	7.9
32.5404	8.1
32.9618	8.2
33.3866	8.3
33.8147	8.4
34.2461	8.5
34.6809	8.6
35.119	8.7
35.5605	8.8
36.0054	8.9
36.4536	9
36.9052	9.1
37.3601	9.2
37.8183	9.3
38.2799	9.4
38.7449	9.5
39.2132	9.6
39.6849	9.7
40.1599	9.8
40.6383	9.9
41.12	10
41.6051	10.1
42.0935	10.2