Short Answer
Weight gain during pregnancy is completely normal and expected. Most women gain between 10–12.5 kg (22–28 lbs) throughout pregnancy, though this varies depending on your starting weight and individual circumstances.
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Why Does Your Body Gain Weight?
The weight you gain during pregnancy isn't just your baby — your body undergoes remarkable changes to support a healthy pregnancy:
- Your baby — around 3–4 kg at birth
- Placenta — about 0.7 kg
- Amniotic fluid — around 0.8 kg
- Increased blood volume — your body produces up to 50% more blood
- Breast tissue — preparing for feeding
- Fat stores — energy reserves for breastfeeding and recovery
What's a Healthy Range?
The recommended weight gain depends on your pre-pregnancy BMI:
- Underweight (BMI under 18.5): 12.5–18 kg
- Healthy weight (BMI 18.5–24.9): 11.5–16 kg
- Overweight (BMI 25–29.9): 7–11.5 kg
- Obese (BMI 30+): 5–9 kg
These are general guidelines — your midwife or GP can give you personalised advice.
The Role of Hormones
Hormonal changes drive much of the weight gain during pregnancy. Progesterone and oestrogen increase significantly, affecting your metabolism, appetite, and how your body stores fat. These changes are your body's way of ensuring both you and your baby have the nutrients you need.
When to Speak to Your Midwife
Contact your midwife or GP if you're concerned about sudden or rapid weight gain, as this could occasionally indicate conditions like pre-eclampsia. Regular antenatal appointments will monitor your health throughout pregnancy.
Still Need Help?
Contact us at help@pillsorted.com or call us for advice on staying healthy during pregnancy.