7 Weeks Pregnant

At 7 weeks, the baby is about 1 cm long and the brain is growing fast. Food aversions and mood swings are common.

Baby is about the size ofA blueberry

LengthAbout 1 cm

WeightLess than 1 g

Week 7 of 40, first trimester33 weeks to go

Your baby at 7 weeks

The brain is growing quickly. Hands and feet look like tiny paddles, and the umbilical cord is forming to carry nutrients and oxygen from the placenta.

Your body at 7 weeks

You may notice food aversions, a metallic taste, more saliva or a stronger sense of smell. Mood swings are common as hormone levels rise.

Your checklist this week

Prepare questions for your first appointment.
Book a dental check-up: gums can bleed more easily in pregnancy.
Keep taking folic acid until at least 12 weeks.

Not sure which week you are in?

Use our Due Date Calculator or Pregnancy Week Calculator to find out exactly how far along you are.

Your baby this week

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When to call your doctor

Bleeding from your vagina
Severe pain in your tummy
A bad headache, blurred vision or sudden swelling
Fluid leaking from your vagina
Fever, or pain when you pass urine
Later in pregnancy, your baby moving less than usual

In an emergency, call your local emergency number.

Based on ACOG and NHS guidance. Sizes are averages: every baby grows at its own pace.