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Pre-pregnancy BMI determines recommended weight gain during pregnancy. Different BMI categories have different healthy gain ranges.
The Formula
Pre-pregnancy BMI categories determine gain: Underweight: 13-18kg | Normal: 11-16kg | Overweight: 7-11kg | Obese: 5-9kg
Standard formula used by professionals worldwide
Worked Example
Step-by-step
Pre-pregnancy BMI 22 (normal) โ recommended gain 11-16kg over full term
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Frequently Asked Questions
Does excess weight gain during pregnancy cause problems?
Higher risk of gestational diabetes, pre-eclampsia, C-section, and heavier babies.
Can I diet during pregnancy?
No โ calorie restriction during pregnancy is not recommended. Focus on nutrient quality.
When does pregnancy weight come off?
Most excess weight (beyond 4-5kg) can take 6-12 months post-birth to return to pre-pregnancy weight.