§second trimester · week 27 of 40
you're 27 weeks pregnant.
last revised · baby is about 36.6 cm (14.4") · 870 g (30.7 oz)
about the size of a cauliflower.
Welcome to the third trimester. The brain is more active than ever, and the baby is sleeping and waking in cycles.
this week's highlights
- Third trimester begins
- Sleep-wake cycles regular
- Brain is highly active
- Hiccups feel frequent
how your baby looks
Skin is still wrinkly because more fat is needed, but the face and limbs are fully formed and proportional.
body in focus
- head
- Brain activity ramps up, including REM-like phases during sleep.
- body
- Sleep-wake cycles are established.
- hands
- Hands explore the body, mouth, and umbilical cord.
- feet
- Strong kicks; movements may briefly distort the belly.
what's happening in your body
Your uterus reaches about 4–5 inches above the belly button. Fatigue may return as the body works harder. Heartburn and shortness of breath are common.
gentle tips
- Track baby's kick patterns daily — 10 kicks in 2 hours is typical.
- Sleep propped slightly upright for heartburn.
- Limit caffeine to one small cup if needed.
- Pack snacks — small frequent meals beat heartburn.
- Take birth and breastfeeding classes if not done.
what to expect next
From now until birth, prenatal visits become more frequent — every two weeks until week 36, then weekly.