16 weeks pregnant
At 16 weeks you are in month 4 and the second trimester. Your baby is about the size of an avocado: 11.6 cm and 144 g.
As big as
avocado
Length
11.6 cm
Weight
144 g
Month
4
Trimester
second trimester
To go
168 days
Averages. Measured crown to rump up to week 20, crown to heel after that. Healthy babies vary a lot.
Your baby this week
The eyes can move; the skeleton shows up on the scan.
Your body
Some feel the first flutters now, others later. Both are normal.
Good to know
Some women feel the first flutters now; with a first pregnancy it often takes longer.
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 16 weeks pregnant?
16 weeks pregnant falls in month 4 of your pregnancy.
Which trimester is 16 weeks?
At 16 weeks you are in the second trimester.
How big is a baby at 16 weeks?
On average 11.6 cm, about the size of an avocado. Healthy babies vary a lot.
How long to go at 16 weeks?
Until your due date (40 weeks): 24 weeks, 168 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.