18 weeks pregnant
At 18 weeks you are in month 5 and the second trimester. Your baby is about the size of a bell pepper: 14.2 cm and 222 g.
As big as
bell pepper
Length
14.2 cm
Weight
222 g
Month
5
Trimester
second trimester
To go
154 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 ears are in place; the baby can start to hear your voice.
Your body
The anomaly scan is often planned around these weeks.
Good to know
Halfway through, the baby is about half its birth length.
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 18 weeks pregnant?
18 weeks pregnant falls in month 5 of your pregnancy.
Which trimester is 18 weeks?
At 18 weeks you are in the second trimester.
How big is a baby at 18 weeks?
On average 14.2 cm, about the size of a bell pepper. Healthy babies vary a lot.
How long to go at 18 weeks?
Until your due date (40 weeks): 22 weeks, 154 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.