§third trimester · week 31 of 40
you're 31 weeks pregnant.
last revised · baby is about 41.1 cm (16.2") · 1500 g (52.9 oz)
about the size of a coconut.
Your baby's senses are nearly newborn-ready. They can hear, see, taste, and respond to touch through the belly.
this week's highlights
- All five senses functional
- Strong startle reflex
- Body length grows fast
- Pupils dilate to light
how your baby looks
Plump and pink. Hair on head is thicker, vernix is still protecting the skin, and limbs are fully proportioned.
body in focus
- head
- Pupils dilate and contract; all senses functional.
- body
- Body length is growing faster than weight.
- hands
- Hands are well-coordinated for sucking and grasping.
- feet
- Strong kicks and stretches feel like ripples.
what's happening in your body
Bump is heavy now. You may feel pelvic pressure, frequent peeing, and occasional Braxton-Hicks. Sleep stays unreliable.
gentle tips
- Practice positions for labor (squatting, leaning forward, hands-knees).
- Get a perineal-massage routine going if recommended.
- Rest with feet up multiple times a day.
- Take birth and breastfeeding classes if not yet completed.
- Discuss when to call your provider during labor.
what to expect next
Prenatal visits become more frequent. Birth feels closer — most babies turn head-down between now and week 36.