Week 27: Last week of trimester two
You’re 27 weeks pregnant — about 13 weeks to go. Your baby is roughly the size of a head of cauliflower.
Size of
a head of cauliflower
Length
36.6 cm
14.4 in · head to heel
Weight
875 g
30.9 oz
Your baby this week
Your baby’s brain is very active and they now have regular sleep and wake cycles. They may suck their thumb and respond to your touch through the bump.
Your body & how you might feel
This is the final week of the second trimester. You may start thinking about birth plans, antenatal classes and the practicalities of the months ahead.
Common symptoms at week 27
- Leg cramps
- Heartburn
- Shortness of breath
- Mood shifts
This week’s tip: Now is a good time to book antenatal or birth-preparation classes — popular ones fill up early.
A gentle reminder: This is an estimate, not medical advice. Dates and figures are general guidance — every pregnancy is different. Your healthcare provider’s assessment, especially from an early ultrasound, always takes priority. Always speak with your provider about your pregnancy.
Week 27 FAQs
How big is the baby at 27 weeks?
At 27 weeks pregnant, your baby is roughly the size of a head of cauliflower, about 36.6 cm (14.4 in) long and around 875 g. These are typical averages — every baby grows at its own pace.
How many months is 27 weeks pregnant?
27 weeks pregnant is about 6 months, in the second trimester, with about 13 weeks to go until your due date.
What are common symptoms at 27 weeks?
Common experiences around week 27 include leg cramps, heartburn, shortness of breath, mood shifts. Symptoms vary widely — contact your provider if anything worries you.