Find your pre-pregnancy BMI category and the recommended total weight gain range during pregnancy, based on Institute of Medicine (IOM) guidelines.
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It depends on your pre-pregnancy BMI: 12.5–18 kg if underweight, 11.5–16 kg if normal, 7–11.5 kg if overweight, and 5–9 kg if obese (single baby, IOM guidelines).
BMI is weight in kilograms divided by height in metres squared (kg ÷ m²), which sets your recommended weight gain range.