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Fetal Macrosomia

Medically reviewed by Last updated on Jan 5, 2023.


Fetal macrosomia (FM)

generally means that your baby weighs more than 8.82 pounds (4,000 grams) at birth. You may hear a similar term, large for gestational age, which means your baby weighs more than other babies at the same gestational age.

Contact your baby's doctor if:

  • You have questions or concerns about your baby's condition or care.

Management of FM:

The provider may recommend a C-section to deliver your baby. This may decrease your and your baby's risk for complications during delivery.

Risks for you:

You may bleed more than expected during delivery. Your pelvic organs may be damaged. These problems may become life-threatening.

Risks for your baby:

Your baby may have low blood sugar levels after birth. Your baby's bones or nerves may be damaged before or during birth. He or she may not get enough oxygen before or during birth. Your baby may need to stay in a neonatal intensive care unit (NICU) to monitor or treat these problems. It is rare that your baby will have long term problems.

Prevent FM in a future pregnancy:

  • Stay active. Activity will help you maintain or reach a healthy weight. Do 30 minutes of activity most days of the week. Talk to your healthcare provider about the type of activity that is best for you.
  • Eat plenty of healthy foods. Healthy foods will help you maintain or reach a healthy weight. Healthy foods include fruits, vegetables, whole-grain breads, low-fat dairy products, beans, lean meats, and fish.
  • Manage your diabetes during pregnancy. Follow your eating and exercise plan. Take your diabetes medicine as directed. Check your blood sugar levels 3 times each day or as directed.

Follow up with your child's doctor as directed:

Write down your questions so you remember to ask them during your visits.

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The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.