Table 2.

Percentile 50 of gestational weight gain at 20 and 40 weeks for maternal pre-pregnancy body mass index groups in all pregnant women and in women without any pregnancy complication

	P50 of weight gain (kg) at 20 weeks		P50 of weight gain (kg) at 40 weeks
	All pregnant women	Women without any pregnancy complication	All pregnant women	Women without any pregnancy complication
Underweight	4.20	4.17	14.20	14.47
Normal weight	3.90	3.91	14.49	14.53
Overweight	3.35	3.28	13.86	13.68
Obesity grade 1	1.95	1.93	11.19	10.99
Obesity grade 2	0.93	0.34	8.73	8.02
Obesity grade 3	−0.35	−0.49	6.27	5.65