Measurements for Amniotic Fluid Assessment







TABLE C-1

Amniotic Fluid Index Values in Normal Pregnancy

Adapted from Moore TR, Cayle JE: The amniotic fluid index in normal human pregnancy. Am J Obstet Gynecol 162:1168, 1990.










































































































































































































Gestational age (wk) AMNIOTIC FLUID INDEX (mm) BY PERCENTILE
3rd 5th 50th 95th 97th
16 73 79 121 185 201
17 77 83 127 194 211
18 80 87 133 202 220
19 83 90 137 207 225
20 86 93 141 212 230
21 88 95 143 214 233
22 89 97 145 216 235
23 90 98 146 218 237
24 90 98 147 219 238
25 89 97 147 221 240
26 89 97 147 223 242
27 85 95 146 226 245
28 86 94 146 228 249
29 84 92 145 231 254
30 82 90 145 234 258
31 79 88 144 238 263
32 77 86 144 242 269
33 74 83 143 245 274
34 72 81 142 248 278
35 70 79 140 249 279
36 68 77 138 249 279
37 66 75 135 244 275
38 65 73 132 239 269
39 64 72 127 226 255
40 63 71 123 214 240
41 63 70 116 194 216
42 63 69 110 175 192


TABLE C-2

Amniotic Fluid Index Values in Normal Pregnancy

From Magann EF, Sanderson M, Martin JN Jr, et al: The amniotic fluid index, single deepest pocket and two diameter pocket in normal pregnancy. Am J Obstet Gynecol 182:1581, 2000.














































































































































































































































Menstrual Age (wk) AMNIOTIC FLUID INDEX (cm) BY PERCENTILE
5th 10th 50th Mean 90th 95th
14 2.8 3.1 5.0 5.4 8.0 8.6
15 3.2 3.6 5.4 5.7 8.2 9.1
16 3.6 4.1 5.8 6.1 8.5 9.6
17 4.1 4.0 6.3 6.6 9.0 10.3
18 4.6 5.1 6.8 7.1 9.7 11.1
19 5.1 5.6 7.4 7.7 10.4 12.0
20 5.5 6.1 8.0 8.3 11.3 12.9
21 5.9 6.6 8.7 8.9 12.2 13.9
22 6.3 7.1 9.3 9.6 13.2 14.9
23 6.7 7.5 10.0 10.3 14.2 15.9
24 7.0 7.9 10.7 11.0 15.2 16.9
25 7.3 8.2 11.4 11.7 16.1 17.8
26 7.5 8.4 12.0 12.3 17.0 18.7
27 7.6 8.6 12.6 12.8 17.8 19.4
28 7.6 8.6 13.0 13.3 18.4 19.9
29 7.6 8.6 13.4 13.6 18.8 20.4
30 7.5 8.5 13.6 13.8 18.9 20.6
31 7.3 8.4 13.6 13.8 18.9 20.6
32 7.1 8.1 13.6 13.7 18.7 20.4
33 6.8 7.8 13.3 13.4 18.2 20.0
34 6.4 7.4 13.9 13.0 17.7 19.4
35 6.0 7.0 12.4 12.5 16.9 18.7
36 5.6 6.5 11.8 11.8 16.2 17.9
37 5.1 6.0 11.1 11.1 15.3 16.9
38 4.7 5.5 10.3 10.3 14.4 15.9
39 4.2 5.0 9.4 9.4 13.7 14.9
40 3.7 4.5 8.6 8.6 12.9 13.9
41 3.3 4.0 7.8 7.7 12.3 12.9

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Nov 8, 2019 | Posted by in GYNECOLOGY | Comments Off on Measurements for Amniotic Fluid Assessment

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