Third trimester
Week 37 of Pregnancy
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About the size of a swiss chard
19.1 in · 48.6 cm · 6.30 lb · 2.86 kg (head to heel)
Your baby this week
- Early term has arrived — every major system is essentially ready.
- The baby keeps practicing breathing, sucking and grasping.
- The final brain and lung maturation continues right up to birth.
What you may be feeling
- Pelvic aches
- Intense Braxton Hicks
- Possible 'bloody show' as labor nears
Gentle tips for this week
- Review labor signs: regular contractions, water breaking, and bloody show — and when to call.
- Our contraction timer is ready when you are: it tracks duration and spacing so you can time the 5-1-1 pattern.
Common question for week 37
What is the 5-1-1 rule?
A common guide for heading in: contractions 5 minutes apart, each lasting 1 minute, continuing for 1 hour. Your provider may give you a different threshold — follow their guidance.
Every pregnancy is different. Sizes are averages, symptoms vary widely, and none of this replaces the guidance of your own provider.