31 Weeks Pregnant
At 31 weeks pregnant your baby is about the size of a coconut. You are in the third trimester, and this week brings its own small changes — for your baby and for you.
- Size of
- a coconut
- Length
- 41.1 cm
- Weight
- 1.5 kg
- Trimester
- 3
Your baby this week
- All five senses are working now.
- Weight gain speeds up noticeably from now on.
- Kicks feel stronger and sharper as space gets tighter.
Your body this week
- Braxton Hicks tightenings may begin — practice contractions, not labour.
- Your lungs have less room, so deep breaths feel harder.
Common symptoms
- Painless tightenings that come and go
- Getting out of breath more easily
- Leg cramps, usually at night
What to expect
The last stretch asks a lot of your body. Sleep gets harder, movement slows down, and your appointments become more frequent. With 9 weeks to go, focus on rest, on knowing the signs of labour, and on having your bag ready.
Tips for this week
- Get to know your baby’s daily pattern and call your midwife if it changes.
- Pack your hospital bag so it is ready from week 36.
- Do pelvic floor exercises daily; they help now and after birth.
Frequently asked questions
How many months is 31 weeks pregnant?
31 weeks is about 7 months. Pregnancy months do not divide evenly into weeks, so counting in weeks is more precise.
How big is my baby at 31 weeks?
At 31 weeks your baby is around a coconut — roughly 41.1 cm long and about 1.5 kg. Healthy babies vary a lot around these averages.
What symptoms are normal at 31 weeks pregnant?
The most common ones this week are listed above. Contact your doctor or midwife about heavy bleeding, severe pain, a fever, or any change in your baby’s movements.
Pregnancy weeks are counted from the first day of your last period, so week 1 begins before conception.
This article is for general information only and is not medical advice. Always talk to your doctor or midwife about your own pregnancy.