Week 27 of pregnancy
27 Weeks Pregnant
Second trimester
Baby size
About the size of a cabbage
36.6 cm
What's developing
You're near the end of the second trimester. The baby has regular sleep and wake cycles now.
Common symptoms this week
- Leg cramps at night
- Restless legs
- Heartburn
- Shortness of breath
This is an estimate for information only — only about 1 in 20 babies arrive on their due date. Always confirm dates with your midwife or doctor.
How big is a baby at 27 weeks?
Baby growth chart
Typical fetal length and weight from week 8 to week 40.
Length
cmWeek 27: 36.6 cm
Weight
gramsWeek 27: 875 g
Typical averages based on Hadlock / ACOG references. Weeks 8–20 use crown–rump length; weeks 21–40 switch to crown–heel — that's the small jump you'll see mid-chart. Real babies vary — your ultrasound is the reliable number for you.55
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