17 weeks pregnant
At 17 weeks you are in month 4 and the second trimester. Your baby is about the size of a pear: 13 cm and 179 g.
As big as
pear
Length
13 cm
Weight
179 g
Month
4
Trimester
second trimester
To go
161 days
Averages. Measured crown to rump up to week 20, crown to heel after that. Healthy babies vary a lot.
Your baby this week
A first layer of fat is forming: insulation for later.
Your body
Your balance shifts a little along with your growing bump.
Good to know
The baby already has sleep and wake rhythms, which rarely match yours.
To sort around these weeks
- The 20 week scan is usually planned between week 18 and 21.
- Many women feel the first movements in these weeks.
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Frequently asked questions
How many months is 17 weeks pregnant?
17 weeks pregnant falls in month 4 of your pregnancy.
Which trimester is 17 weeks?
At 17 weeks you are in the second trimester.
How big is a baby at 17 weeks?
On average 13 cm, about the size of a pear. Healthy babies vary a lot.
How long to go at 17 weeks?
Until your due date (40 weeks): 23 weeks, 161 days.
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.