BMI (kg/m2)	Classification	Total weight gain range (kg)	Rates of weight gain in 2nd and 3rd trimester* (kg/week)
< 18.5	Underweight	12.5–18	0.51 (0.44–0.58)
18.5–24.9	Normal	11.5–16	0.42 (0.35–0.50)
25–29.9	Overweight	6.8–11.3	0.28 (0.23–0.33)
≥ 30	Obese	5–9.1	0.22 (0.17–0.27)

^*Data presented as mean (range). Source: Adapted from the Royal Australian and New Zealand College of Obstetricians and Gynaecologists. ⁶⁶