Four Quadrant Amniotic Fluid Index

Moore TR and Cayle JE. The amniotic fluid index in normal

human pregnancy. Am J Obstet Gynecol 1990;162:1168-1173

GA	5th Percentile	50th Percentile	95th Percentile
16	79	121	185
17	83	127	194
18	87	133	202
19	90	137	207
20	93	141	212
21	95	143	214
22	97	145	216
23	98	146	218
24	98	147	219
25	97	147	221
26	97	147	223
27	95	146	226
28	94	146	228
29	92	145	231
30	90	145	234
31	88	144	238
32	86	144	242
33	83	143	245
34	81	142	248
35	79	140	249
36	77	138	249
37	75	135	244
38	73	132	238
39	72	127	226
40	71	123	214
41	70	116	194
42	69	110	175