39 Weeks Pregnant

Your baby is the size of a Mini watermelon 🍉

🥗 Nutrition Tips

• Light easily digestible labor food
• Coconut water for electrolytes
• Avoid large meals

🏃‍♀️ Exercise Tips

• Walking to encourage labor
• Nipple stimulation (with provider advice) to increase oxytocin
• Rest and stay calm

Week 39 is the big one: your baby is now officially full term. At about 19.9 inches and 7.2 pounds — roughly the size of a small pumpkin — your baby’s brain and lungs have reached the maturity that makes this the ideal time for birth. Research shows that babies born at 39 to 40 weeks have the best outcomes on average, which is why providers aim for this window. For you, every day may feel like the longest day: you are watching for labor signs, fielding “any news?” messages, and trying to rest while excitement builds. Your provider may discuss elective induction at 39 weeks if you are low-risk — studies suggest it can be a safe option worth considering. Your baby could arrive literally any moment now.

👶Baby Development at Week 39

At 39 weeks your baby is full term — the brain has developed the coordination for breathing, sucking, and swallowing simultaneously, and the lungs are mature enough for efficient air breathing. The brain will keep growing rapidly after birth, but the critical in-womb development is complete. This is the sweet spot providers aim for: full development with the lowest rates of newborn complications.

Your baby’s skin is smooth and pink, with most of the vernix gone except in the creases. Fat layers are complete, providing insulation and energy reserves for the first days of feeding. The skull remains soft and flexible, with fontanelles that let the head mold to the birth canal — nature’s elegant solution for delivery.

The digestive system is ready for milk, the liver is processing waste, and the kidneys are fully functional. Your baby’s immune system carries your antibodies, offering protection in the vulnerable first months. The lungs are producing plenty of surfactant, and the breathing movements practiced for weeks are about to pay off with that first powerful cry.

Your baby is curled tightly in the pelvis, head down and engaged, with very little room to move — but movements should still follow the usual pattern of stretches, rolls, and hiccups. Amniotic fluid is decreasing as your baby grows, and the placenta continues to deliver nutrients. Any decrease in movement at this stage still deserves an immediate call to your provider.

🩺Your Body: Common Symptoms at Week 39

▸ Signs Labor Is Near

Lightening, increased discharge, the mucus plug, and stronger Braxton Hicks can all signal your body is preparing. True labor adds regular, intensifying contractions.

▸ Pelvic Pressure

Your baby’s head pressing on the pelvis can cause aching, waddling, and sharp lightning pains. Warm baths and rest help; it means progress.

▸ Frequent Urination

The baby’s head on your bladder means constant bathroom trips, day and night. Keep hydrating — it matters more than ever.

▸ Loose Stools

Hormonal shifts can loosen digestion as labor approaches. Eat lightly and stay hydrated.

▸ Bursts of Energy or Exhaustion

You may swing between nesting marathons and total fatigue. Follow your body’s lead and rest when it asks.

▸ Backache

A persistent dull backache, especially with cramping, can be an early labor sign. Mention new back pain patterns to your provider.

🏥Medical Tests & Checkups at Week 39

Weekly visits continue with blood pressure, urine, fundal height, fetal heart tones, and cervical checks tracking dilation and effacement. Your provider is watching closely for any signs of preeclampsia or concerns that would change the plan.

This week many providers discuss elective induction at 39 weeks for low-risk pregnancies — research (including the well-known ARRIVE trial) suggests that inducing at 39 weeks can be a safe choice that may lower the chance of cesarean in first-time mothers. Your provider will explain the Bishop score (a measure of cervical readiness) and what induction involves, so you can make an informed decision together. If you prefer to wait, your provider will outline the monitoring plan for 40 weeks and beyond.

🥗Nutrition & Movement Tips

Eat light, familiar foods — labor could start at any time.

Stay hydrated with water and electrolyte drinks.

Keep protein intake steady to maintain energy reserves.

Walk, use the birth ball, and stay upright to encourage labor.

Practice relaxation between Braxton Hicks to rehearse for real contractions.

Sleep whenever you can — rest is your most important preparation now.

✅Week 39 Checklist

📌When to Call Your Doctor

You are full term, so labor signs are welcome — but some symptoms still need urgent care. Keep this list on the fridge.

Contractions 5 minutes apart, lasting a minute, for a full hour.

Your water breaks — note time, color, and amount; call right away.

Decreased fetal movement — always call, even at full term.

Heavy bleeding, severe headache, vision changes, or sudden swelling.

Fever, green-tinged fluid, or constant severe pain between contractions.