Week 40
Trimester 3Days 39+0 to 39+6
Baby is now the size of a watermelon
Welcome to Week 40. You have reached your due week. Whether labor begins today, tomorrow, or a little later, your pregnancy is nearing its conclusion and your baby will soon be in your arms. A due date is only an estimate — only a small percentage of babies are actually born on their exact due date. Your baby is fully developed and ready for life outside the womb. Now it is simply a matter of timing.
Length
50–52 cm
19.7 in–20.5 in
Weight
3.3–3.8 kg
7.3 lb–8.4 lb
Development highlights
- check_circleYour baby is ready — lungs mature, digestive system ready, kidneys functioning, heart fully developed, nervous system prepared for life outside the womb.
- check_circleBrain development continues rapidly with new neural connections constantly forming for learning, memory, language, movement, and emotional development.
- check_circleSome babies continue gaining small amounts of weight while waiting for labor, building fat stores for temperature regulation and energy.
- check_circleMovement remains important — may feel strong, slow, rolling, and stretchy due to very limited space.
- check_circleYour baby continues practicing breathing, swallowing, sleeping, waking, and sucking — all skills needed very soon.
This week's milestones
- check_circleDue date reached.
- check_circleFully prepared for birth.
- check_circleRecognizes your voice.
- check_circleAll systems ready.
Fun fact
At birth, your baby will likely recognize your voice immediately, having listened to it every day for months.
Weekly checklist
- Monitor baby movements.
- Stay hydrated.
- Eat balanced meals.
- Rest whenever possible.
- Keep labor plans ready.
- Enjoy the final days of pregnancy.
Frequently asked questions
Is it normal not to have delivered by my due date?
Yes. Many healthy pregnancies continue beyond the estimated due date — only a small percentage of babies arrive on their exact due date.
When should I call my healthcare provider?
Follow the guidance provided by your healthcare team regarding contractions, reduced movements, water breaking, or other concerns.
Is my baby still growing?
Yes. Growth and development continue right up until birth.
Why am I so emotional?
You are approaching one of the biggest moments of your life. Strong emotions are completely normal.
Related tools
shopping_bagHelpful picks for Trimester 3
Browse all pregnancy products →Frida Mom Motherload Hospital Bag
30-piece pre-packed hospital bag covering labor, postpartum, and newborn grooming — organized in removable toiletry bags.
Momcozy M5 Wearable Electric Breast Pump
Hands-free wearable electric pump that fits discreetly in your bra — portable and quiet for pumping on the go.
Birth Comb & Acupressure Massage Ball
Labor pain relief set using acupressure — hold the comb during contractions to activate pressure points.
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Medical information disclaimer
The content on this page is provided for general informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment.
Always consult your GP, midwife, health visitor, paediatrician, or other qualified healthcare provider before making decisions about your health or your child's health and development. Never ignore or delay seeking professional advice because of something you have read on BabyScout. If you think there is a medical emergency, call 999 (UK) or your local emergency services immediately.