Week 39
Your baby is the size of a Mini watermelon
Baby Size
Mini watermelon
Length
14.4 in (36.5 cm)
Weight
5.9 lb (2.65 kg)
Trimester
Third Trimester
Your Baby at Week 39
Full-term! Your baby is the size of a mini watermelon and ready for birth. The brain is still developing rapidly and will continue to grow after birth.
Key milestone: Your baby is full-term! The brain continues developing rapidly. The baby can focus their eyes and track light.
Your Symptoms
Impending labor signs. Increased pelvic pressure. Diarrhea or loose stools (hormonal). Cervix may begin dilating.
Tip for This Week
You're full-term! Any day now. Try relaxation techniques, gentle walking, and rest.
Your Body at Week 39
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 39 is the size of a Mini watermelon, measuring about 14.4 in (36.5 cm) and weighing roughly 5.9 lb (2.65 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
Full-term! Your baby is the size of a mini watermelon and ready for birth. The brain is still developing rapidly and will continue to grow after birth. The key milestone this week is that your baby is full-term! the brain continues developing rapidly. the baby can focus their eyes and track light.
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
“Full-term and fabulous — my first hello is almost here.”
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 is the difference between full-term and early-term?
Full-term is 39-40 weeks. Babies born at full-term have the best health outcomes with fully mature lungs and brains.
How can I naturally induce labor?
Gentle walking, sex (prostaglandins in semen can help), nipple stimulation, and acupressure may help. Always consult your provider.