20 weeks pregnant
At 20 weeks you are in month 5 and the second trimester. Your baby is about the size of a banana: 25.6 cm and 330 g.
As big as
banana
Length
25.6 cm
Weight
330 g
Month
5
Trimester
second trimester
To go
140 days
Averages. Measured crown to rump up to week 20, crown to heel after that. Healthy babies vary a lot.
Your baby this week
Halfway there! The baby sleeps and wakes in its own rhythm.
Your body
Many women feel clear movements now.
Good to know
For most women this is when the detailed scan takes place.
To sort around these weeks
- Find out how maternity leave and pay work for you and your employer.
- Start thinking about antenatal classes and who will support you after the birth.
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Frequently asked questions
How many months is 20 weeks pregnant?
20 weeks pregnant falls in month 5 of your pregnancy.
Which trimester is 20 weeks?
At 20 weeks you are in the second trimester.
How big is a baby at 20 weeks?
On average 25.6 cm, about the size of a banana. Healthy babies vary a lot.
How long to go at 20 weeks?
Until your due date (40 weeks): 20 weeks, 140 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.