Quick guide:

• What’s happening with the baby at 39 weeks pregnant?

• How big is your baby at 39 weeks pregnant?

• How is your belly at 39 weeks pregnant?

• Common symptoms and how to manage them?

• Frequently asked questions at 39 weeks pregnant

What’s happening with the baby at 39 weeks pregnant?

Gaining fat

Your baby is still adding fat to help regulate their body temperature after birth. This fat layer also gives your baby their adorable, plump appearance.

Reflexes and movements

Your baby has strong reflexes and is ready to interact with the world. They can firmly grip your finger, turn their head, and have coordinated sucking and swallowing reflexes needed for feeding.

Vision

Newborns can see about 15 to 25 cm away, which is the perfect distance to focus on your face when you hold them close. Their vision will gradually improve over the next few months as they begin to see further and more clearly.

Skin and nails

Your baby’s fingernails are fully formed and may extend past their fingertips, meaning they might need a trim shortly after birth. Surface skin cells are shedding as new skin develops underneath.

How big is your baby at 39 weeks pregnant?

At 39 weeks pregnant, your baby is about the size of a mini-watermelon. They measure approximately 50 cm from head to toe and weigh around 3.43 kg. Your baby is fully developed, and any additional weight they gain now is primarily fat to help regulate their body temperature after birth.

How is your belly at 39 weeks pregnant?

At 39 weeks pregnant, your belly is at its largest and most prominent as you prepare to meet your baby. Here’s what you might notice:

Size and shape

• Your belly is likely stretched to its limit, feeling tight and heavy as it accommodates your full-term baby.

• If your baby has dropped lower into your pelvis (lightening), your belly may appear lower than in previous weeks, which might relieve pressure on your lungs but increase pressure on your pelvis and bladder.

Sensations

• Braxton Hicks contractions: These “practice contractions” may feel more frequent or intense as your body gets ready for labor.

• Pressure and discomfort: You may experience pelvic pain, lower back aches, or sharp pains (lightning crotch) as your baby’s head presses on nerves and your cervix.

Skin changes

• Stretch marks might be more noticeable as your belly reaches its peak size.

• The skin on your belly might feel itchy or sensitive due to the stretching; moisturizing can help soothe this.

Common symptoms and how to manage them?

1) Baby kicks

Your baby should remain active right up to delivery. A noticeable decrease in movement could be a sign of distress.

How to manage: Monitor your baby's movements regularly. If you notice fewer than 10 movements in two hours, contact your provider immediately.

2) Braxton Hicks contractions

These “practice contractions” might feel more frequent and stronger as your body prepares for labor.

How to manage: Rest, hydrate, and change positions to ease discomfort. If contractions become regular, stronger, and closer together, they may signal true labor – call your provider.

3) Pelvic pain

As your baby moves lower into your pelvis, you may feel increased pressure and pain.

How to manage: Use a pregnancy support belt, rest frequently, and avoid standing or walking for long periods. Gentle stretches or a warm bath can also help.

4) Leaking fluid

If your water breaks, you may notice a sudden gush or a slow leak of fluid.

How to manage: Call your healthcare provider immediately. They’ll guide you on the next steps, as labor typically begins shortly after your water breaks.

5) Diarrhea

Hormones preparing your body for labor can speed up your digestive system, causing diarrhea.

How to manage: Stay hydrated and eat small, bland meals. Avoid foods that could upset your stomach, and contact your provider if diarrhea lasts more than a couple of days.

6) Mood swings

Hormonal fluctuations, excitement, and anxiety about labor and motherhood can make emotions run high.

How to manage: Practice self-care, talk to a trusted friend or partner, and rest as much as possible. If mood swings feel overwhelming or depressive, reach out to your provider.

7) Different vaginal discharge

You might notice increased discharge or “bloody show” as your cervix thins and dilates.

How to manage: Wear panty liners for comfort. Call your provider if you see bright-red bleeding, foul-smelling discharge, or think your water has broken.

8) Back pain

Carrying your full-term baby puts strain on your lower back, causing discomfort.

How to manage: Try prenatal stretches, use a warm compress, or take a warm bath. A pregnancy support belt or prenatal massage can also help.

9) Heartburn

Your baby pressing on your stomach can worsen heartburn.

How to manage: Eat smaller meals, avoid spicy or fatty foods, and sleep with your head elevated. If needed, consult your provider about safe antacid options.

Frequently asked questions at 39 weeks pregnant

Is it normal to feel less baby movement now?

No, your baby should remain active until delivery. While movements may feel different due to limited space, you should still notice regular activity. If you feel fewer than 10 movements in two hours, contact your provider immediately.

What does losing the mucus plug mean?

The mucus plug is a protective barrier that blocked your cervix during pregnancy. Losing it is a sign that labor may be approaching, though it doesn’t guarantee it will happen immediately.

Can I go into labor at 39 weeks?

Yes, labor is common at this stage. Watch for signs such as regular contractions, your water breaking, or bloody show. If you experience these symptoms, contact your provider.

What should I do if my water breaks?

Call your provider right away, even if you’re not sure. They’ll advise you on the next steps. If contractions don’t begin after your water breaks, labor may need to be induced to reduce the risk of infection.

Why do I have diarrhea at 39 weeks?

Hormonal changes can cause diarrhea as your body prepares for labor. While it’s usually harmless, stay hydrated and contact your provider if it lasts more than a couple of days or is accompanied by other concerning symptoms.

Is pelvic pain normal at 39 weeks?

Yes, as your baby drops into your pelvis, you may feel increased pressure and pain. This is normal but can be uncomfortable. Rest, use a support belt, and avoid strenuous activity.

How do I know if it’s true labor or Braxton Hicks?

True labor contractions are regular, become progressively stronger, last longer, and occur closer together. Braxton Hicks contractions are irregular, less intense, and often go away with rest or hydration.

Should I prepare for induction at 39 weeks?

If your pregnancy is healthy, your provider may discuss induction to avoid complications. Induction at 39 weeks is common and can be scheduled if needed, but natural labor often begins around this time.