5 weeks pregnant
At 5 weeks you are in month 2 and the first trimester. Your baby is about the size of a sesame seed: 0.3 cm.
As big as
sesame seed
Length
0.3 cm
Month
2
Trimester
first trimester
To go
245 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 heart is being formed; the tube that becomes the spinal cord closes.
Your body
Tiredness and tender breasts often show up this early.
Good to know
A pregnancy test reacts to hCG, which roughly doubles every two days early on.
To sort around these weeks
- Take a pregnancy test and book a first appointment with a midwife or your GP.
- Work out your due date with the calculator so you know where you are.
Follow your pregnancy week by week
In PERIOD. baby you see every week how big your baby is, what is happening and what you can arrange. No ads, and we never sell your data.
Frequently asked questions
How many months is 5 weeks pregnant?
5 weeks pregnant falls in month 2 of your pregnancy.
Which trimester is 5 weeks?
At 5 weeks you are in the first trimester.
How big is a baby at 5 weeks?
On average 0.3 cm, about the size of a sesame seed. Healthy babies vary a lot.
How long to go at 5 weeks?
Until your due date (40 weeks): 35 weeks, 245 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.