39 Weeks Pregnant
At 39 weeks pregnant, your baby is about the size of a honeydew melon.
- Length
- 48 cm (18.9 in)
- Weight
- 2.9 kg (6 lb 6 oz)
- Trimester
- Third
- Month
- Month 9
- Weeks to go
- 1
Size of a honeydew melon
Your baby at 39 weeks
Your baby is full term at 39 weeks. They are about the size of a honeydew melon, and their brain and lungs are still developing quickly.
Your body at 39 weeks
Signs of labor include regular contractions that get closer together and stronger, back pain, your waters breaking or a bloody show.
Common symptoms at 39 weeks pregnant
- Contractions
- Lower back pain
- Diarrhea or loose stools
- Bursts of energy
Every pregnancy is different. Having none of these symptoms is normal too.
Tips for week 39
- Use a contraction timer to track frequency and duration.
- Call your provider or go in if your waters break, you have bleeding, or the baby moves less.
- Keep moving gently: walking can help you stay comfortable.
Your week 39 checklist
- Time contractions when they start
- Call if movements change
- Keep moving gently
Helpful at 39 weeks
39 Weeks Pregnant: your questions answered
How big is a baby at 39 weeks pregnant?
At 39 weeks your baby is about the size of a honeydew melon: around 48 cm (18.9 in) long and weighing about 2.9 kg (6 lb 6 oz). Every baby grows at their own pace.
How many months is 39 weeks pregnant?
39 weeks pregnant is month 9 of your pregnancy, in the third trimester. Your due date is 1 week away.
Is 39 weeks full term?
Yes. 39 weeks 0 days to 40 weeks 6 days is full term, the healthiest time for most babies to be born.
Sources
This guide is written from public guidance by the American College of Obstetricians and Gynecologists (ACOG), the NHS, the CDC and the World Health Organization. Baby sizes are averages; your baby may be bigger or smaller and still perfectly healthy.
General information only, not medical advice.
History of updates
- : Added a weekly checklist and common questions.
- : Matched fruit, length and weight to the Prego app.
- : Published.