42 weeks pregnant
At 42 weeks you are in month 10 and the third trimester. Your baby is about the size of a big watermelon: 51.5 cm and 3.9 kg.
As big as
big watermelon
Length
51.5 cm
Weight
3.9 kg
Month
10
Trimester
third trimester
To go
due
Averages. Measured crown to rump up to week 20, crown to heel after that. Healthy babies vary a lot.
Your baby this week
Still busy growing, even in this final stretch.
Your body
Talk with your care provider about next steps for you; these can differ per situation.
Good to know
Almost nobody gets here: most births have started well before this week.
To sort around these weeks
- You are close to or at your due date: rest where you can.
- After 41 weeks your midwife talks you through the next steps.
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Frequently asked questions
How many months is 42 weeks pregnant?
42 weeks pregnant falls in month 10 of your pregnancy.
Which trimester is 42 weeks?
At 42 weeks you are in the third trimester.
How big is a baby at 42 weeks?
On average 51.5 cm, about the size of a big watermelon. Healthy babies vary a lot.
How long to go at 42 weeks?
You are due. A birth between 37 and 42 weeks counts as on time.
All weeks
General information, not medical advice. If in doubt, call your midwife or GP. Sources: WHO fetal growth charts (Kiserud et al., PLoS Med 2017); Robinson and Fleming 1975; NHS, Your pregnancy and baby guide.