How accurate is a due date?

A due date is an estimate. Only about 1 in 20 babies arrive on it; most are born within two weeks either side.

Can my due date change?

Yes — early ultrasound measurements can refine it. Later scans usually do not shift an established date.

Are these baby-size comparisons exact?

The fruit and vegetable comparisons are friendly approximations of average length. Every pregnancy is unique — your baby may be a little larger or smaller.

Week 8 of pregnancy

8 Weeks Pregnant

First trimester

Baby size

About the size of a raspberry

1.6 cm

What's developing

Fingers and toes are starting to form, and the embryo is officially graduating to a fetus soon. Movement is not yet felt.

Common symptoms this week

Morning sickness
Frequent urination
Breast changes
Fatigue

This is an estimate for information only — only about 1 in 20 babies arrive on their due date. Always confirm dates with your midwife or doctor.

How big is a baby at 8 weeks?

Baby growth chart

Typical fetal length and weight from week 8 to week 40.

Weeks 8–40

Length

Week 8: 1.6 cm

Weight

grams

Week 8: 1 g

Typical averages based on Hadlock / ACOG references. Weeks 8–20 use crown–rump length; weeks 21–40 switch to crown–heel — that's the small jump you'll see mid-chart. Real babies vary — your ultrasound is the reliable number for you.55

Frequently asked questions

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