Third trimester
Pregnancy Week 39
Your baby is about the size of a mini watermelon.
Size
mini watermelon
Length
50 cm
Weight
3290 g
Baby in week 39
"Full term" — ideal time for delivery. Last weight gains.
What you may notice this week
Body in active labor preparation. Energy or "nesting" surge possible.
Tips for week 39
- Don't over-exert with nesting
- Light meals if labor approaches
- Try to nap
Tools that pair with this week
Due Date Calculator
Estimate your delivery date by last period or conception date. Naegele’s rule plus cycle adjustments.
Week Tracker
See exactly how many weeks and days pregnant you are, plus your trimester and key milestones.
Contraction Timer
Tap once to start, once to stop. Tracks duration, frequency, and pattern over time.
Ovulation Calculator
Find your fertile window based on your cycle length. Plan or avoid with confidence.
Baby Name Generator
Filter by origin, style, length, and starting letter. Boys, girls, and unisex.
Growth Percentile
Plot your baby’s weight, length, and head circumference against WHO percentile curves.