13 weeks pregnant: baby is the size of a lemon
At 13 weeks, baby is about the size of
a lemon
This is the last week of the first trimester.
- Length7.4 cm (2.9 in)
- Weight23 g (0.8 oz)
- Trimester1 of 3
Baby is measured from head to bottom (crown to rump) at this stage. These are rounded averages. Your ultrasound is the only real measurement of your baby.
Questions moms ask
How big is a baby at 13 weeks?
At 13 weeks, baby is about the size of a lemon: around 7.4 cm (2.9 in) long from head to bottom (crown to rump), and weighs about 23 g (0.8 oz). Every baby grows at their own pace.
What trimester is 13 weeks?
13 weeks is in the first trimester.
How many months pregnant is 13 weeks?
Roughly month 3 of 9.
Related tools
This page gives estimates, not medical advice. If you're worried about your baby's growth, talk to your doctor or midwife.