Gestational weight gain charts for twin pregnancies in Southeast China

Table 3 Means and standard deviations (SDs) of gestational weight gain for gestational ages in underweight, normal-weight, and overweight groups based on regression equations

Gestational Age	Underweight			Normal weight			Overweight
Gestational Age	Weight observations	Mean (kg)	SD	Weight observations	Mean (kg)	SD	Weight observations	Mean (kg)	SD
7	0	NA	NA	4	0.61	4.53	1	−0.79	4.54
8	0	NA	NA	6	0.94	4.53	1	−0.40	4.54
9	3	1.40	4.53	23	1.27	4.53	4	0.50	4.54
10	13	1.73	4.53	94	1.61	4.53	23	1.02	4.54
11	26	2.07	4.53	155	1.94	4.53	33	1.61	4.54
12	28	2.42	4.53	148	2.29	4.53	43	2.26	4.54
13	26	2.87	4.53	133	2.66	4.53	32	2.87	4.54
14	29	2.91	4.53	147	2.91	4.53	28	2.91	4.54
15	27	3.02	4.53	147	3.02	4.53	34	3.01	4.54
16	40	3.24	4.53	136	3.23	4.53	35	3.21	4.54
17	30	3.59	4.53	192	3.58	4.53	42	3.54	4.54
18	55	4.11	4.53	236	4.10	4.53	48	4.03	4.54
19	34	4.84	4.53	165	4.83	4.53	31	4.71	4.54
20	42	5.79	4.54	131	5.77	4.54	37	5.60	4.54
21	31	6.90	4.54	141	6.87	4.54	30	6.63	4.55
22	29	8.08	4.54	187	8.04	4.54	42	7.72	4.55
23	52	9.24	4.55	202	9.19	4.55	42	8.78	4.56
24	48	10.30	4.57	194	10.23	4.57	38	9.73	4.58
25	34	11.18	4.59	177	11.09	4.59	47	10.49	4.60
26	51	11.81	4.62	210	11.71	4.62	51	11.00	4.64
27	56	12.27	4.66	222	12.15	4.66	55	11.34	4.68
28	48	12.67	4.72	244	12.53	4.72	49	11.61	4.75
29	69	13.10	4.80	285	12.95	4.80	65	11.93	4.84
30	57	13.68	4.91	267	13.51	4.91	57	12.39	4.96
31	74	14.47	5.05	309	14.28	5.05	75	13.07	5.11
32	74	15.39	5.22	313	15.18	5.22	67	13.89	5.30
33	69	16.33	5.43	296	16.10	5.44	72	14.74	5.54
34	89	17.17	5.69	374	16.93	5.70	78	15.50	5.82
35	87	17.84	6.00	379	17.58	6.01	91	16.10	6.16
36	120	18.37	6.35	465	18.09	6.36	106	16.57	6.54
37	102	18.82	6.73	409	18.53	6.74	96	16.97	6.95
38	41	19.27	7.13	109	18.96	7.15	35	17.37	7.39
39	12	19.71	7.55	27	19.39	7.57	6	17.76	7.85

ISSN: 1471-2393