Third trimester
Pregnancy Week 31
Your baby is about the size of a coconut.
Size
coconut
Length
41 cm
Weight
1500 g
Baby in week 31
Five senses are working. Movements may be more visible from outside.
What you may notice this week
Braxton Hicks more frequent. Possible leaky breasts.
Tips for week 31
- Time Braxton Hicks to distinguish from real labor
- Pack hospital bag
- Take prenatal photos
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.