**3.11 GWG**

### *3.11.1 GWG according to BMI*

The gestational weight gain observed in each BMI class was almost in accordance with that provided by IOM. Average weight gain observed in underweight was 12.93 ± 1.90, in normal 12.32 ± 1.71, in overweight 10.23 ± 1.28 and in obese 9.6 ± 1.50. A partial negative correlation (r = −0.474) was found between GWG and pre-pregnancy BMI, i.e. as pre-pregnancy BMI increases, the GWG decreases (**Figure 19**).
