Week 31 of Pregnancy
Third trimester
For informational purposes only. This page is not medical advice. Every pregnancy is different — always consult your doctor, midwife, or healthcare provider for guidance specific to your situation. In an emergency, call your provider or 911 immediately.
Baby is
about the size of a coconut
16.2 inches · 3.3 lbs
Baby this week
- •Brain is rapidly developing with increased neural connections
- •Eyes can open and close, and baby can see light filtering through the womb
- •Bones are hardening, though skull remains flexible for birth
- •Baby is practicing breathing movements and can respond to sounds and light
You this week
- •Increased back and pelvic pain as baby's weight shifts
- •Shortness of breath as uterus presses against diaphragm
- •Frequent urination and possible incontinence when coughing or sneezing
- •Swelling in feet and ankles
- •Braxton Hicks contractions becoming more noticeable
- •Trouble sleeping and general fatigue
This week's tips
- •Practice perineal massage to potentially reduce tearing during delivery—ask your provider for guidance
- •Wear supportive, flat shoes and consider a maternity support belt for back relief
- •Sleep on your left side to improve blood flow to baby and reduce swelling
- •Stay hydrated and eat smaller, frequent meals to manage heartburn and digestion
- •Begin reviewing your birth plan options and hospital/birth center policies
Informational only — always check with your doctor or midwife for advice specific to you and your baby.
Looking ahead
You're entering the home stretch! Over the next few weeks, baby will continue gaining weight and settling into a head-down position for birth. It's time to finalize childcare plans, install car seats, and prepare your home for baby's arrival.
Track your pregnancy on BringBaby
Join free to track your pregnancy week-by-week and find baby-friendly places to visit as baby grows.
For informational purposes only. This page is not medical advice. Every pregnancy is different — always consult your doctor, midwife, or healthcare provider for guidance specific to your situation. In an emergency, call your provider or 911 immediately.
This content is for informational purposes only and is not medical advice. Every pregnancy and baby is different. Always consult your doctor, midwife, or pediatrician for guidance specific to your situation.
More free tools
Looking for places to bring baby?
Explore BringBaby