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Baby size by week

8 weeks pregnant: baby is the size of a kidney bean

At 8 weeks, baby is about the size of

a kidney bean

Fingers and toes are starting to form.

Week 7Week 9

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 8 weeks?

At 8 weeks, baby is about the size of a kidney bean: around 1.6 cm (0.6 in) long from head to bottom (crown to rump), and weighs about 1 g (0.0 oz). Every baby grows at their own pace.

What trimester is 8 weeks?

8 weeks is in the first trimester.

How many months pregnant is 8 weeks?

Roughly month 2 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.