37 Weeks Pregnant
You’re 37 weeks pregnant — in the third trimester, and 3 weeks to go until your due date. Your baby is about the size of a winter melon this week.
★ Early term — the baby is essentially ready for birth.
How big is your baby at 37 weeks?
Size of a
winter melon
Length
~48.6 cm
Weight
~2859 g
Last week your baby was about the size of a romaine lettuce; this week it's grown to roughly a winter melon.
Sizes are averages from standard fetal-growth references. Every baby grows at its own pace — your provider tracks yours at scans.
Baby development at week 37
The baby is now 'early term'. The lungs and brain are still maturing — they keep developing right up to and beyond birth — but the baby is essentially ready. Practising breathing, sucking, blinking, and gripping continue. The baby is likely head-down and settling deeper into the pelvis. About the size of a winter melon.
Your body at 37 weeks
Common symptoms many people notice around week 37 include:
- Increased pelvic pressure and discharge
- Possible loss of the mucus plug
- Stronger, more frequent Braxton Hicks
- Difficulty sleeping and moving comfortably
Symptoms vary enormously from person to person and pregnancy to pregnancy. Not having a symptom on this list is just as normal as having it.
Tips for week 37
- Know the difference between Braxton Hicks and real labour contractions
- Watch for your water breaking or a bloody show
- Keep your phone charged and birth bag by the door
What trimester is 37 weeks?
Week 37 falls in the third trimester. As a quick map: the first trimester runs weeks 1–13, the second covers weeks 14–27, and the third is week 28 through birth (a due date is set at 40 weeks). Want your own dates? Our Pregnancy Due Date Calculator shows your due date and exactly how far along you are today.
The third trimester (weeks 28–40+) is about growth and getting ready for birth. Prenatal visits become more frequent, the baby gains most of its weight, and you'll watch for the signs of labour. Tiredness and physical discomfort tend to return as the due date approaches.
Frequently asked questions
- How many months is 37 weeks pregnant?
- 37 weeks pregnant is about 9 months. Pregnancy months don't divide evenly into 4-week blocks, so week-to-month conversions are approximate — most providers track pregnancy by week, not month.
- How big is the baby at 37 weeks?
- At 37 weeks, the baby is about the size of a winter melon, roughly 48.6 cm and around 2859 g. These are averages — healthy babies vary, and your provider tracks your baby's own growth curve at scans.
- What trimester is 37 weeks?
- Week 37 is in the third trimester. The first trimester is weeks 1–13, the second is weeks 14–27, and the third is weeks 28 to birth (around week 40).