Third Trimester
39 Weeks Pregnant
Brain development continues—it will for years after birth!
🍉
Your baby is the size of a Mini watermelon
50.7 cm
Crown-Rump Length
3.29 kg
Approximate Weight
Week 1Week 13 — End of Trimester 1Week 27Week 42
🧒 Baby's Development This Week
In week 39, your baby is putting on weight quickly and fine-tuning their lung and brain function. They are becoming more responsive to light and sound from the outside world as they prepare for the big transition to life outside.
- Major organ systems are forming.
- Reflexes are developing.
- Facial features become more distinct.
- Bones are hardening.
- Nervous system matures.
🤰 Your Symptoms at Week 39
As you progress through week 39, you may feel more physical strain as your baby grows. Back pain and difficulty finding a comfortable sleeping position are common. Keep your feet up when you can and take pride in how far you've come in this incredible process.
Fatigue
Rest when possible.
moderate
Rest when possible.
moderate
Nausea
Eat small, frequent meals.
mild
Eat small, frequent meals.
mild
Breast tenderness
Wear a supportive bra.
mild
Wear a supportive bra.
mild
Frequent urination
Stay hydrated but limit evening fluids.
moderate
Stay hydrated but limit evening fluids.
moderate
Mood swings
Talk to your partner or friends.
mild
Talk to your partner or friends.
mild
Body Changes
- Uterus is expanding.
- Blood volume is increasing.
- Skin changes may occur.
When to Call Your Doctor
- Severe abdominal pain or cramping
- Heavy bleeding or spotting
- Severe dizziness or fainting
✅ Week 39 Checklist
- Take prenatal vitaminsEssential
- Drink plenty of waterEssential
- Eat a balanced dietRecommended
- Exercise moderatelyRecommended
- RestEssential
❓ Frequently Asked Questions
Is it normal to feel tired?
Yes, fatigue is very common.
What should I be eating?
A balanced diet with plenty of fruits and vegetables.
Can I exercise?
Yes, moderate exercise is generally safe and beneficial.
When will I feel the baby move?
Usually between 16 and 25 weeks.
How much weight should I gain?
It depends on your pre-pregnancy BMI. Ask your doctor.
👩⚕️
Reviewed by Dr. Sarah Johnson, OB/GYNLast reviewed May 2024
Sources
- American College of Obstetricians and Gynecologists (ACOG)
- Intergrowth-21st Fetal Growth Standards
⚕️ Medical Disclaimer: This content is reviewed by medical professionals but is for informational purposes only. Always consult your healthcare provider for personalized guidance about your pregnancy.