Week 33 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 pineapple
17.2 inches · 4.2 lbs
Baby this week
- •Pupils can dilate and constrict in response to light
- •Bones are fully formed but still soft and pliable
- •Toenails and fingernails are fully grown
- •Fatty layers under skin continue to accumulate for temperature regulation
- •Brain development accelerates with increased neural connections
You this week
- •Increased Braxton-Hicks contractions (practice contractions)
- •Pelvic pressure and heaviness, especially when standing
- •Shortness of breath as baby takes up more space
- •Lower back pain from shifted center of gravity
- •Frequent urination and occasional leaking when coughing or sneezing
- •Swelling in feet and ankles
- •Difficulty finding comfortable sleeping positions
This week's tips
- •Time your Braxton-Hicks contractions to distinguish them from labor contractions—they should ease with movement or position changes
- •Invest in a pregnancy pillow or body pillow to support your growing belly and reduce back strain during sleep
- •Practice pelvic floor exercises (Kegels) daily to help with delivery preparation and postpartum recovery
- •Elevate your feet when resting to manage swelling, and stay hydrated
- •Wear compression socks if swelling is significant, and avoid crossing your legs for long periods
- •Start discussing your birth plan with your healthcare provider if you haven't already
Informational only — always check with your doctor or midwife for advice specific to you and your baby.
Looking ahead
You're in the home stretch now—just seven weeks to go! In the coming weeks, your baby will continue gaining weight and developing the strength needed for birth, while you may experience more frequent practice contractions and increasing fatigue. This is a good time to finalize your birth preferences and childcare arrangements.
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