A prospective analysis of optimal total weight gain ranges and trimester-specific weight gain rates for Chinese pregnant women

Table 3 Optimal gestational weight gain for Chinese pregnant women

	Maternal pre-gravid BMI category^a			Overall
	Underweight (n = 7805)	Normal weight (n = 31,787)	Overweight/obese^b (n = 11,533)	Overall
Whole pregnancy
Total weight gain (kg)	10.30 [8.18, 13.00]	10.14 [7.32, 12.51]	6.26 [1.96, 9.38]	9.31 [6.22, 12.25]
1st-2nd trimester
Total weight gain (kg)	7.36 [5.32, 9.94]	6.36 [4.32, 8.35]	–	5.92 [2.16, 8.44]
Rate of weight gain (kg/w)	0.28 [0.20, 0.38]	0.24 [0.17, 0.32]	–	0.23 [0.08, 0.32]
3rd trimester
Total weight gain (kg)	2.68 [0.91, 4.46]	2.61 [1.42, 5.30]	2.00 [1.05, 3.49]	2.28 [1.20, 4.88]
Rate of weight gain (kg/w)	0.19 [0.07, 0.32]	0.19 [0.10, 0.38]	0.14 [0.08, 0.25]	0.16 [0.09, 0.35]

^a Categorized by WHO Asian [25]
^b The curve of impact of GWG in the first two trimesters on adverse pregnancy outcome among pre-gravid overweight or obese women was almost linear, without the lowest risky value which is required to obtain the optimal GWG range, thus an optimal GWG range in this subgroup was inaccessible
BMI body mass index

ISSN: 1471-2393