Table 3: Weight gain in pregnancy according to preconceptional BMI, adapted by IOM Guidelines 2009 [44].

BMIBMI limit (kg/m2) (WHO)Recommended weight gain in pregnancy (kg)Recommended weight gain per week (2nd and 3rd trimesters)

Underweight<18.513–180.5
Normal weight18.5–24.911–160.5
Overweight25.0–29.97–110.3
Obesity≥30.05–90.2