Week 1 Pregnancy
1 weeks pregnant at a glance
- You are in the first trimester.
- Conception is happening or preparing to happen.
- No appointments yet, but it's a good time to start taking folic acid and vitamin D.
- Every pregnancy is different, so don't worry if your experience varies slightly.
You are 1 weeks pregnant and in your first trimester. This week's key development: It Begins.
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. Always speak to a qualified healthcare professional if you have symptoms, concerns, or questions about your pregnancy.
Baby's Development
Your baby is about the size of not here yet.
It Begins — Pregnancy is counted from the first day of your last period. Your body is quietly preparing, shedding its lining and building fresh, ready to receive new life. Conception hasn't happened yet, but the journey has already started.
Your Symptoms
- Menstrual bleeding
- Cramping
- Mood swings
- Fatigue
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
No appointments yet, but it's a good time to start taking folic acid and vitamin D.
Practical Advice for Week 1
Nutrition
- Start taking 400mcg folic acid daily — this is the single most important supplement right now.
- Take 10mcg vitamin D daily, as recommended by the NHS for all UK adults.
- Eat plenty of leafy greens, beans, and fortified cereals for natural folate.
- Stay well hydrated — aim for 6–8 glasses of fluid per day.
Exercise
- Continue your normal exercise routine — there's no need to change anything yet.
- Walking, swimming, and cycling are all excellent choices.
- Start practising pelvic floor exercises (Kegels) to build a strong foundation.
- Aim for 150 minutes of moderate activity per week, as the NHS recommends.
Wellbeing
- If you're trying to conceive, try to reduce stress where you can — it genuinely helps.
- Talk to your partner about how you're both feeling about this journey.
- Get into a good sleep routine — aim for 7–9 hours per night.
- Consider cutting back on caffeine to under 200mg per day (about 2 cups of coffee).
Preparation
- Start taking folic acid and vitamin D if you haven't already.
- Book a GP appointment or contact your local maternity service to discuss your plans.
- Review any medications with your GP to check they're safe for pregnancy.
- Check that you're up to date with vaccinations, especially rubella.
Tip of the Week
Start taking 400mcg of folic acid daily to help your baby's neural tube develop correctly.
Frequently Asked Questions for Week 1
How many months is 1 weeks pregnant?
What size is the baby at 1 weeks?
What are the common symptoms at 1 weeks pregnant?
Is 1 weeks in the first trimester?
Are there any NHS appointments at 1 weeks?
Tools & Calculators
Sources and further reading
Track Your Due Date
Keep track of your pregnancy milestones, NHS scans, and countdown to your due date.
Go to TrackerNHS Resources
Find trusted information on financial support, antenatal classes, and local maternity services.
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