Third trimester
Pregnancy Week 40
Your baby is about the size of a small pumpkin.
Size
small pumpkin
Length
51 cm
Weight
3460 g
Baby in week 40
Officially due. Most babies arrive within 2 weeks of due date — only ~5% on the exact day.
What you may notice this week
Everything from "nothing yet" to active labor. Both are normal.
Tips for week 40
- Stay in close touch with your provider
- Watch for water breaking
- Trust your body — it knows what to do
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.