40 Weeks Pregnant
Summary
Size
small watermelon
Length
51.2 cm
Weight
3462 g
Until due date
0 weeks
40 / 40 week
%100
What's Happening With Your Baby
You're at your due date. The baby is fully developed. The skull bones are still mobile and can overlap as they pass through the birth canal.
What's Changing For You
Only a small share of births happen exactly on the due date; waiting until weeks 41 to 42 is normal. Monitoring becomes more frequent in this period.
To Do This Week
Past week 40, keep every appointment for NST and amniotic fluid monitoring.
If your doctor suggests induction, ask about the reasoning and the alternatives.
Be patient: birth between weeks 37 and 42 is medically considered normal.
Frequently Asked Questions
How many months is 40 weeks pregnant?
Week 40 of pregnancy falls in month 9 and in the third trimester. Pregnancy months don't run in neat four-week blocks, so the week-to-month conversion rarely lands on a whole number — which is why pregnancy is tracked in weeks.
How big is the baby at 40 weeks?
At 40 weeks your baby is roughly the size of a small watermelon: around 51.2 cm long and 3462 grams. These are averages; clear variation between babies is normal, and what matters is the growth curve your doctor is tracking.
How long is left at 40 weeks pregnant?
You're at week 40 — your due date is this week. Only a small share of births happen exactly on that date; waiting until week 42 is medically normal, and monitoring becomes more frequent in this period.
What should I watch out for at 40 weeks?
Past week 40, keep every appointment for NST and amniotic fluid monitoring. If your doctor suggests induction, ask about the reasoning and the alternatives. Be patient: birth between weeks 37 and 42 is medically considered normal.
Track your pregnancy week by week
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Related Guides
When To Seek Care Immediately
Whatever week you are in, contact your doctor or the nearest health facility without waiting if you have: vaginal bleeding or fluid loss, severe persistent abdominal pain, a severe headache, blurred vision or flashing lights, sudden swelling of the hands or face, a fever above 38 °C, burning on urination with fever, persistent vomiting, fainting, or — after week 28 — a clear reduction in your baby's movements. In these situations reach real medical care rather than an app or a web search.
This content is for informational purposes only and does not replace medical advice. Always consult your doctor or midwife about your own or your baby's health.