Weight Gain During Pregnancy: A Guide to a Healthy Pregnancy with Excess Weight

In short: The right weight gain in pregnancy depends on the weight before it: more for women who start underweight and less for those who are overweight or obese. Obesity (a body mass index above 30) triples the risk of gestational diabetes and pre-eclampsia and raises the risk of blood clots. A balanced diet with fewer sweets and fried foods helps.

Most women who are overweight go on to conceive and give birth to healthy babies. However, carrying extra weight can increase the risk of certain complications for both mother and baby — and the higher the body mass index (BMI), the greater the risk tends to be. The good news is that many of these risks can be managed with the right care and lifestyle habits.

How can you reduce these risks?

• Eat a healthy, balanced diet, making gradual, sustainable changes to your eating habits to avoid excessive weight gain during pregnancy.
• Stay physically active with gentle exercise such as swimming and walking — start with 15 minutes, three times a week, and gradually build up to 30 minutes daily.
• If your BMI is 30 or more, take folic acid 5 mg daily, ideally starting at least one month before trying to conceive and continuing until 12 weeks of pregnancy, together with vitamin D 10 micrograms daily.
• Attend extra checks that your doctor may recommend: a glucose tolerance test for gestational diabetes at 24–28 weeks, low-dose aspirin from 12 weeks if you have additional risk factors for pre-eclampsia, and an assessment of your risk of blood clots.

Risks that may increase during pregnancy due to weight gain:

• Blood clots (a blood clot in the leg or lung, which can be life-threatening).
• Gestational diabetes — women with a BMI over 30 are about three times more likely to develop gestational diabetes than those with a BMI under 25.
• Preeclampsia and gestational hypertension — the risk of developing these conditions may increase around 3 times if BMI is over 30, especially if the mother is over 40 years old, has had preeclampsia in a previous pregnancy, or had high blood pressure before pregnancy.
• Risks to the baby, including early miscarriage, fetal demise, or a baby born weighing more than 4 kg, along with related complications.

For these reasons, it’s generally recommended to work toward a healthy weight before planning a pregnancy, aiming to keep your BMI below 30 where possible. Your doctor can help you set realistic, personalized goals.

What is a typical weight gain pattern during pregnancy?

• From the first to the third month: Most women don’t need to gain much weight at all — and if some weight is gained, it’s preferable that it doesn’t exceed 0–2 kg.

• From the fourth to the ninth month: Steady weight gain becomes important for your baby’s growth. For women who are overweight or obese, this is typically about 1 kg per month (around 1.5–2 kg per month is the pattern for women who start pregnancy at a normal weight).

Helpful nutrition guidelines to follow during pregnancy:

• Eat a variety of light meals spread throughout the day, divided into around five smaller meals.

• Drink plenty of fluids, especially water.

• Enjoy fresh fruits and vegetables, which help you feel full while staying low in calories.

• Reduce your intake of sweets and fried foods as much as possible.

• Cut back on fast food, which can contribute to weight gain without offering much nutritional value for you or your baby.

• Include proteins essential for your baby’s cell growth, such as meat, eggs, dairy products, and legumes.

• Choose calcium-rich foods like milk, yogurt, and cheese to support your baby’s bone development.

What is a healthy weight gain range during pregnancy?

If your BMI is between 25 and 29.9, a healthy weight gain is typically around 7 to 11 kg.

If your BMI is 30 or higher, a healthy weight gain is typically around 5 to 9 kg.

Your doctor can guide you toward the range that’s right for your individual situation.

Is it possible to lose weight during pregnancy?

If you’re considering managing your weight during pregnancy, it’s important to do so gently — pregnancy is not the time for strict dieting or intense exercise programs. Always talk to your doctor before starting any exercise routine, so you can eat healthily and stay active in a way that suits your stage of pregnancy.

What is a suitable diet for pregnant women?

Avoid fried foods and opt for grilled options instead.

Choose thoroughly washed fresh fruits and vegetables.

Avoid starting a weight-loss diet during pregnancy without medical guidance.

Reduce your salt intake, as it can cause fluid retention and may contribute to high blood pressure.

How can I protect myself from excessive weight gain during pregnancy?

Starting pregnancy at a healthy weight makes a real difference. Here are simple steps that can help:

1. Eat healthy, balanced foods during pregnancy

2. Drink enough water throughout the day

3. Start a simple, gentle walking routine

4. Stay active with pregnancy-appropriate exercise

If you have questions about managing your weight before or during pregnancy, the team at Dr. Najeeb Layyous’s clinic is here to guide you with personalized, compassionate care every step of the way.

Dr Najeeb Layyous F.R.C.O.G

Consultant Obstetrician, Gynecologist and Infertility Specialist