Pregnancy week 31
This week your baby is about the size of coconut — around 41.1 cm and 1502 g.
Your baby this week
Your baby is now about the size of a coconut and is gaining weight quickly as fat fills out the body into a rounder shape. The lungs are maturing more and more in preparation for breathing, and the brain can send faster, more organized signals. Your baby can now turn their head from side to side, and with less room to move, you may feel their motions as clear stretches and presses.
Your body this week
You might notice a few drops of yellowish colostrum leaking from your breasts, which is completely normal as your body prepares for feeding. Shortness of breath, trouble sleeping, and Braxton Hicks contractions are also common, and all are signs that your body is getting ready for what's ahead.
Tips for this week
Experiment with comfortable sleeping positions, using supportive pillows between your knees and under your belly to ease the pressure. Take slow, deep breaths when you feel short of breath, and pause to rest whenever you need to. This can be a good time to learn about the signs of labor and ask your midwife or doctor about them so you feel reassured.
Frequently asked questions
How big is the baby at week 31?+
At week 31, your baby is about the size of coconut — roughly 41.1 cm and 1502 g, though every baby grows at its own pace.
Which trimester is week 31?+
Week 31 falls in the Third trimester.
How many weeks are left at week 31?+
At week 31, you have about 9 weeks to go until the typical 40-week due date.
Is week 31 normal?+
Every pregnancy is different. If you feel well and your check-ups are on track, week 31 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.