Table 4.

Reference values of BMI according to initial BMI classification: low-weight and adequate-weight pregnant women.

	Low Weight (Initial BMI <18.5 kg/m2)					Adequate Weight (18.5≤ Initial BMI <25 kg/m2)					Overweight (25≤ Initial BMI <30 kg/m2)					Obese (Initial BMI ≥30 kg/m2)
GA	n	Mean	SD	P5%	P95%	n	Mean	SD	P5%	P95%	n	Mean	SD	P5%	P95%	n	Mean	SD	P5%	P95%
<8	9	17.7	0.53	15.9	17.8	88	22.1	1.77	18.3	24.0	55	26.3	2.18	24.4	28.5	26	35.2	4.14	30.3	41.2
8	7	17.7	0.96	16.0	18.0	56	22.0	1.90	18.4	24.2	42	27.1	1.37	24.5	28.7	11	35.4	3.86	30.4	41.3
9	5	17.5	1.02	16.1	18.2	41	21.8	2.07	18.5	24.4	27	27.4	1.66	24.6	28.9	21	34.1	3.37	30.4	41.4
10	8	17.2	1.15	16.2	18.5	55	22.1	1.88	18.7	24.6	35	26.7	1.51	24.7	29.1	23	35.0	3.42	30.4	41.4
11	6	18.1	0.68	16.3	18.7	55	22.0	1.91	18.8	24.8	28	27.1	1.68	24.8	29.3	18	34.3	3.38	30.5	41.5
12	7	17.8	1.31	16.4	19.0	58	22.2	1.97	19.0	25.0	46	26.9	1.58	24.9	29.6	19	35.0	4.98	30.5	41.6
13	5	17.8	1.05	16.5	19.2	58	21.8	1.76	19.1	25.2	45	27.3	1.59	25.0	29.8	18	35.3	2.83	30.6	41.7
14	7	18.7	1.77	16.7	19.4	53	22.2	2.16	19.3	25.4	50	27.0	1.58	25.1	30.0	26	34.1	3.49	30.6	41.8
15	14	17.7	1.13	16.8	19.7	76	22.1	1.93	19.4	25.6	49	26.9	1.82	25.2	30.2	33	34.8	3.51	30.7	41.8
16	6	18.5	0.37	16.9	19.9	47	22.4	2.31	19.6	25.9	37	27.2	1.73	25.3	30.4	22	34.1	2.94	30.7	41.9
17	4	18.1	0.97	17.0	20.2	67	22.6	1.67	19.7	26.1	37	27.4	1.46	25.4	30.6	21	35.2	4.63	30.8	42.0
18	6	19.0	1.36	17.1	20.4	56	23.0	1.87	19.9	26.3	43	28.0	1.76	25.5	30.8	14	35.5	2.61	30.8	42.1
19	7	19.0	0.65	17.2	20.6	62	23.1	1.93	20.0	26.5	54	27.6	1.78	25.6	31.1	21	35.8	3.97	30.8	42.1
20	11	18.6	1.12	17.3	20.9	61	23.0	2.23	20.1	26.7	34	27.9	1.61	25.7	31.3	27	34.7	2.90	30.9	42.2
21	7	18.6	1.50	17.4	21.1	74	23.4	2.11	20.3	26.9	38	28.7	2.01	25.8	31.5	25	34.4	2.55	30.9	42.3
22	8	19.6	1.28	17.5	21.4	55	23.9	2.08	20.4	27.1	48	28.4	1.81	25.8	31.7	18	37.9	4.48	31.0	42.4
23	4	18.8	1.44	17.6	21.6	53	23.2	2.00	20.6	27.3	43	28.6	1.86	25.9	31.9	22	36.7	4.25	31.0	42.5
24	10	19.5	1.29	17.8	21.8	69	24.1	2.11	20.7	27.5	49	28.8	1.45	26.0	32.1	25	35.6	2.45	31.1	42.5
25	6	20.6	0.73	17.9	22.1	70	24.2	2.08	20.9	27.7	35	28.7	2.00	26.1	32.3	21	34.8	4.19	31.1	42.6
26	6	20.8	1.30	18.0	22.3	62	24.4	1.96	21.0	27.9	48	29.4	1.81	26.2	32.5	29	35.5	3.25	31.2	42.7
27	7	20.6	1.59	18.1	22.6	58	24.1	1.85	21.2	28.1	52	29.2	2.19	26.3	32.8	18	36.3	3.08	31.2	42.8
28	6	19.6	1.00	18.2	22.8	66	25.0	2.10	21.3	28.3	45	29.3	3.21	26.4	33.0	19	36.2	3.59	31.2	42.9
29	11	20.0	1.64	18.3	23.0	65	24.9	2.29	21.5	28.5	32	29.1	1.68	26.5	33.2	29	36.0	3.32	31.3	42.9
30	10	20.9	1.34	18.4	23.3	81	25.1	2.04	21.6	28.7	53	29.8	2.27	26.6	33.4	31	36.1	3.44	31.3	43.0
31	8	21.9	1.69	18.5	23.5	74	24.9	2.28	21.7	29.0	52	30.1	2.03	26.7	33.6	31	36.7	3.47	31.4	43.1
32	10	20.4	2.31	18.6	23.8	92	25.6	2.28	21.9	29.2	62	30.0	1.98	26.8	33.8	33	36.1	2.57	31.4	43.2
33	12	20.8	2.08	18.8	24.0	81	25.6	2.28	22.0	29.4	68	30.1	2.18	26.9	34.0	32	36.9	3.42	31.5	43.2
34	13	21.3	1.40	18.9	24.2	104	26.0	2.17	22.2	29.6	62	30.2	2.24	27.0	34.3	32	36.4	2.96	31.5	43.3
35	13	22.4	1.70	19.0	24.5	122	26.0	2.16	22.3	29.8	79	30.7	2.30	27.1	34.5	38	37.4	3.51	31.6	43.4
36	15	21.7	1.63	19.1	24.7	137	26.4	2.50	22.5	30.0	107	30.7	2.22	27.2	34.7	54	37.5	3.69	31.6	43.5
37	28	22.1	1.86	19.2	25.0	165	26.6	2.33	22.6	30.2	125	31.2	3.01	27.3	34.9	57	37.5	3.45	31.6	43.6
38	25	22.3	2.00	19.3	25.2	172	26.6	2.24	22.8	30.4	99	31.1	2.48	27.4	35.1	53	37.4	3.21	31.7	43.6
39	11	23.2	2.17	19.4	25.4	119	26.6	2.18	22.9	30.6	86	31.2	2.75	27.5	35.3	49	36.1	3.30	31.7	43.7
40	5	23.1	2.35	19.5	25.7	45	27.2	2.43	23.1	30.8	38	31.0	2.52	27.6	35.5	17	36.6	3.79	31.8	43.8

P5% - 5th Percentile - Inferior Limit; P95% - 95th Percentile - Superior Limit.