Week 29
Trimester 3Days 28+0 to 28+6
Baby is now the size of a coconut
Welcome to Week 29. Your baby is now growing rapidly and gaining weight at an impressive pace. While much of the body's development is already complete, the coming weeks are incredibly important for building strength, maturing organs, and preparing for life outside the womb. Your little one is now active, responsive, and developing their own daily routines.
Length
38–39 cm
15.0 in–15.4 in
Weight
1.2–1.4 kg
2.6 lb–3.1 lb
Development highlights
- check_circleYour baby is steadily adding fat stores, muscle mass, and bone strength to prepare for life after birth.
- check_circleThe brain continues rapid growth, forming deeper folds and grooves for more complex neural connections supporting learning, memory, and future problem-solving.
- check_circleMovements are becoming increasingly powerful — you may feel strong kicks, rolling, stretching, and pressure from elbows, knees, and feet.
- check_circleThe skull remains relatively flexible to help during birth, while other bones continue hardening.
- check_circleSurfactant production in the lungs continues increasing, greatly improving your baby's ability to breathe after birth.
This week's milestones
- check_circleRapid weight gain phase well underway.
- check_circleBrain forming increasingly deep folds.
- check_circleMuscles producing powerful, coordinated movements.
- check_circleLungs continuing significant maturation.
Fun fact
Your baby may already respond differently to familiar voices compared to unfamiliar sounds.
Weekly checklist
- Continue prenatal vitamins.
- Stay hydrated.
- Eat balanced meals.
- Stay active.
- Monitor baby movements.
- Continue working on birth and postpartum preparations.
Frequently asked questions
Is swelling normal?
Mild swelling in the feet and ankles is common during the third trimester. Sudden or severe swelling should be discussed with your healthcare provider.
Why are the kicks so strong now?
Your baby is larger, stronger, and more coordinated than ever before.
Is it normal to struggle with sleep?
Yes. Sleep difficulties are extremely common during the third trimester.
Should I be monitoring movements?
Yes. Becoming familiar with your baby's normal movement patterns is helpful as pregnancy progresses.
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.