Week 40 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.

    Week 39Week 41

    Baby is

    about the size of a small pumpkin or watermelon

    19-21 inches · 7-8 lbs (average)

    Baby this week

    • Baby is fully developed and ready for birth anytime
    • Lungs are mature and ready to take first breaths
    • Baby may be in head-down position, engaged in pelvis
    • All major organs are functioning
    • Baby can regulate their own body temperature

    You this week

    • Persistent lower back pain and pelvic pressure
    • Increased Braxton-Hicks contractions (may feel more intense)
    • Cervical mucus changes and possible bloody show
    • Extreme fatigue mixed with restlessness and anxiety
    • Frequent urination and possible bowel changes
    • Swelling in feet and ankles
    • Difficulty sleeping despite exhaustion
    • Emotional intensity as labor approaches

    This week's tips

    • Rest when you can, but also try gentle movement like walking to encourage labor progress
    • Time contractions and know when to contact your healthcare provider (typically when they're 5-1-1: five minutes apart, lasting one minute, for one hour)
    • Keep your hospital bag or birth center bag packed and ready by the door
    • Eat nutritious, easily digestible meals—labor is demanding work
    • Try comfort measures: warm baths, position changes, breathing techniques, or massage
    • Stay hydrated and keep your support person close
    • Trust your body—you're almost there
    • Practice relaxation techniques to manage anxiety about labor

    Informational only — always check with your doctor or midwife for advice specific to you and your baby.

    Looking ahead

    You're at term! Labor could begin anytime now. Some pregnancies go past 40 weeks, and that's okay—your healthcare provider will monitor you both closely. Focus on staying calm, rested, and ready for your 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.

    Looking for places to bring baby?

    Explore BringBaby