Pregnancy week 39
This week your baby is about the size of a mini watermelon — around 50.7 cm and 3288 g.
Your baby this week
Your baby is now the size of a mini watermelon and is considered full term, ready to be born at any time. The lungs keep making the substance that supports breathing, and the brain keeps growing quickly even after birth. The fat layer is now enough to regulate body temperature in the outside world, and the skin is smooth and complete. The fingernails may need trimming after birth, and your baby is simply waiting for the right moment to meet you.
Your body this week
You may feel very heavy and tired, along with a strong longing to finally meet your baby. It is common to see early signs of labor such as contractions growing stronger and more regular, or the mucus plug passing. Every woman's experience is her own, so try not to compare yourself to others, and call your doctor if your waters break or contractions become regular.
Tips for this week
Breathe deeply and relax whenever you feel tense, as calm helps your body work in harmony. Stay hydrated, have light energizing snacks, and move gently if you can. Review the signs of labor and when to head to the hospital with your doctor, and trust that you are very close to the long-awaited meeting.
Frequently asked questions
How big is the baby at week 39?+
At week 39, your baby is about the size of a mini watermelon — roughly 50.7 cm and 3288 g, though every baby grows at its own pace.
Which trimester is week 39?+
Week 39 falls in the Third trimester.
How many weeks are left at week 39?+
At week 39, you have about 1 weeks to go until the typical 40-week due date.
Is week 39 normal?+
Every pregnancy is different. If you feel well and your check-ups are on track, week 39 is usually a normal part of the journey — but always reach out to your doctor or midwife with any concern.
This guide is for general information and reassurance — it isn't medical advice. Always follow your doctor or midwife for your own pregnancy.