7 Weeks Pregnant: Baby Size, Symptoms and UK Milestones

First Trimester

Guide reviewed: July 2026Reviewed against cited UK guidance

At 7 weeks pregnant, use this UK guide to understand baby size, common symptoms, likely NHS timing, and the practical dates to keep on your radar.

7 weeks pregnant at a glance

You are in the first trimester.
Your baby is roughly the size of a blueberry.
Ensure you've registered with a midwife.
Every pregnancy is different, so don't worry if your experience varies slightly.

You are 7 weeks pregnant and in your first trimester. Your baby is about the size of a blueberry. This week's key development: Budding Arms & Legs. NHS note: Ensure you've registered with a midwife.

This page is for general pregnancy planning and date guidance only. It is not medical advice, diagnosis, or treatment. Pregnancy dates are estimates and can change after a scan or advice from your midwife, GP, or maternity team.

If you have symptoms, concerns, or questions about your pregnancy, speak to your midwife, GP, or maternity team. For urgent help, use NHS 111; call 999 in an emergency. Read how we source and review content in our editorial policy.

Week 6

Week 8

Baby's Development

Your baby is about the size of a blueberry.

Budding Arms & Legs — Arm and leg buds are growing longer, and tiny paddles that will become hands are forming. The brain is developing at a staggering pace — around 100 new brain cells every minute. Nausea may be peaking this week.

Blueberry

Approx. 1cm

Your Symptoms

Excessive saliva
Food cravings
Acne or skin changes
Mood swings

Every pregnancy is different. You may experience all, some, or none of these symptoms — and that's completely normal. If anything concerns you, speak to your midwife.

NHS Appointments

Ensure you've registered with a midwife. You'll receive a 'Bounty' pack or similar resources soon.

Practical Advice for Week 7

Nutrition

Folic acid and vitamin D — keep going.
If food aversions are strong, eat whatever you can manage without guilt.
Zinc-rich foods (meat, shellfish, seeds) support your baby's cell growth.
Avoid shark, swordfish, and marlin due to mercury content.

Exercise

Modify exercises if you're feeling nauseated — shorter, gentler sessions are fine.
Walking in fresh air can actually help reduce nausea.
Gentle Pilates strengthens your core without strain.
Stay hydrated before, during, and after any exercise.

Wellbeing

Excessive saliva (ptyalism) is a real and annoying symptom — it does get better.
Mood swings are driven by hormones and are completely normal.
If you're struggling with food cravings, indulge sensibly but don't restrict yourself.
Try keeping a gratitude journal — it can genuinely shift your mindset during difficult days.

Preparation

Ensure you're registered with a midwife and have a booking appointment date.
Think about whether you want NHS or private midwifery care (or a combination).
Start a pregnancy folder — keep appointment letters, scan photos, and your maternity notes together.
Research antenatal classes in your area — NHS classes are free but book up quickly.

Tip of the Week

Pelvic floor exercises (Kegels) are great to start now and continue throughout your life.

Frequently Asked Questions for Week 7

How many months is 7 weeks pregnant?

At 7 weeks pregnant, you are roughly 1 months pregnant. Remember that pregnancy is typically measured in weeks rather than months for clinical accuracy.

What size is the baby at 7 weeks?

At 7 weeks, your baby is roughly the size of a blueberry (about 1cm). Arm and leg buds are growing longer, and tiny paddles that will become hands are forming. The brain is developing at a staggering pace

What are the common symptoms at 7 weeks pregnant?

Common symptoms at this stage include excessive saliva, food cravings, acne or skin changes, mood swings. Remember that every pregnancy is unique, and it's normal to experience different symptoms.

Is 7 weeks in the first trimester?

Yes, 7 weeks falls within the first trimester.

Are there any NHS appointments at 7 weeks?

Ensure you've registered with a midwife. You'll receive a 'Bounty' pack or similar resources soon.

Tools & Calculators

Due Date Calculator UK Pregnancy Week Calculator Timeline by Due Date How Many Weeks Am I?

Sources and further reading

Checked for UK week 7 pregnancy information guidance in July 2026.

How we review content

We prioritise official NHS and GOV.UK guidance, then relevant professional-body information where needed.

Source links are checked on the review date shown above. Your midwife, GP, maternity team, fertility clinic, or employer can give advice that is more specific to your circumstances.

Week 6

Week 8

Track Your Due Date

Keep track of your pregnancy milestones, NHS scans, and countdown to your due date.

Go to Tracker

NHS Resources

Find trusted information on financial support, antenatal classes, and local maternity services.

View Resources

All Weeks

Browse the complete week-by-week pregnancy guide from conception to birth.

View All Weeks

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