Pregnancy week by week

Pregnancy Week by Week Full Guide UK: All 42 Weeks Explained

Welcome to your comprehensive pregnancy week-by-week full guide UK. The nine months of pregnancy are a time of monumental change, and having a reliable tracker for every milestone can reduce anxiety and boost your confidence. This hub is your definitive directory, detailing every key development, symptom, and preparation checklist across all 42 weeks of the journey.


Our Content Promise & Safety Disclaimer

All information in this guide is aligned with current NHS protocols and based on the experience of UK mothers.

DISCLAIMER: This content is for informational purposes only. Consult your midwife or GP immediately with any health concerns


Your Journey, Trimester by Trimester


The First Trimester: Weeks 1–12 (Conception to Foundation)

The beginning is often the most secretive and symptom-heavy. Focus is on vital cell division, establishing your pregnancy, and navigating early symptoms like extreme fatigue and nausea. This phase concludes with your first crucial scans and checks.

The Second Trimester: Weeks 13–27 (The Golden Period)

With energy often returning and the risk of miscarriage significantly lower, the second trimester is generally the smoothest. You’ll feel your baby move for the first time, and preparation shifts toward major purchases and planning the nursery.

The Third Trimester: Weeks 28–42 (Growth and Arrival)

This phase is marked by rapid fetal growth, increased discomfort, and intensive preparation for labour. This is when antenatal appointments become frequent, and your focus shifts entirely to your Labour & Birth plan and final hospital checks.

Weeks 1-4 Week 5 Week 6 Week 7 Week 8 Week 9 Week 10
Week 11 Week 12 Week  13 Week 14 Week 15 Week 16 Week 17
Week 18 Week 19 Week 20 Week 21 Week 22 Week 23 Week 24
Week 25 Week 26 Week 27 Week 28 Week 29 Week 30 Week 31
Week 32 Week 33 Week 34 Week 35 Week 36 Week 37 Week 38
Week 39 Week 40 Weeks 41 Week 42

Conclusion: Motherhood Made Easy

Being well-informed is the greatest tool you have. Use this tracker as your personalised map, and remember to check back weekly.


Visit our Pregnancy Pillar Page for holistic advice.
Scroll to Top