3rd trimester · Week 31
31 weeks pregnant
All five senses in rehearsal
Taste, touch, hearing, and responses to light are active in limited ways. Fat continues to smooth the skin. Birth-class timing is reasonable now if you want it.
How big is your baby at 31 weeks?
- Length
- 41.1 cm
- Weight
- 1,500 g
- Size
- Zucchini
On average about 41.1 cm long and 1,500 g. Size comparison: Zucchini.
These are averages; every baby grows at their own pace.
How is your baby developing at 31 weeks?
The irises can dilate a little. The fetus may have a favorite rest position. Average length is about 41 cm; weight often near 1.5 kg. Lungs still need more surfactant and time.
What changes in your body at 31 weeks?
Braxton Hicks after a busy day, pelvic pressure, and leaking colostrum can occur — or none of these. Heartburn may peak.
Tips for this week
If fluid leaks in a trickle, put on a pad and call; it is hard to tell sweat from amniotic fluid yourself. Practice perineal massage only if you want to and your clinician has not advised against it. Review who will support you in labor.
