Week 40
Your baby is the size of a Small pumpkin
Baby Size
Small pumpkin
Length
14.8 in (37.6 cm)
Weight
6.3 lb (2.85 kg)
Trimester
Third Trimester
Your Baby at Week 40
You've reached 40 weeks — the finish line! Your baby is the size of a small pumpkin and fully developed. The vernix coating has been mostly absorbed, and your baby is getting cozy until the big day.
Key milestone: Your baby is fully developed and ready for birth. The immune system has received antibodies from you. The vernix coating is mostly absorbed.
Your Symptoms
Full pelvic pressure. Frequent, intense Braxton Hicks. Excitement, anxiety, and readiness.
Tip for This Week
Stay calm — most first-time moms deliver around 40w5d. Your baby will arrive when they're ready.
Your Body at Week 40
In the third trimester, your growing uterus presses against your diaphragm, stomach, and bladder. Shortness of breath, heartburn, and frequent urination are common. Your body is producing relaxin, a hormone that loosens joints and ligaments to prepare for birth.
Your baby at week 40 is the size of a Small pumpkin, measuring about 14.8 in (37.6 cm) and weighing roughly 6.3 lb (2.85 kg). Every kick, roll, and hiccup is a sign that your baby is growing strong. Soon you'll hold them in your arms.
Your Baby's Development This Week
You've reached 40 weeks — the finish line! Your baby is the size of a small pumpkin and fully developed. The vernix coating has been mostly absorbed, and your baby is getting cozy until the big day. The key milestone this week is that your baby is fully developed and ready for birth. the immune system has received antibodies from you. the vernix coating is mostly absorbed.
The third trimester is about preparation — your baby is practicing breathing, sucking, and swallowing for life outside the womb. Each week of this stage significantly improves their chances of a healthy start. The countdown to meeting your baby has begun.
This week's voice theme
“The grand finale — I've been practicing my first word for 40 weeks.”
Imagine hearing this every morning — a voice note from your baby that evolves week by week.
Hear your baby's voice →Frequently Asked Questions
What happens if I go past 40 weeks?
Most providers recommend induction at 41-42 weeks to reduce risks. Your provider will monitor you closely.
How accurate are due dates?
Only about 5% of babies arrive exactly on their due date. A due date is an estimate — your baby will arrive when ready.