Illustration of a pregnant woman with a Pregnancy Week-by-Week Tracker, timeline showing baby growth stages

Pregnancy Week-by-Week Tracker

Estimate your due date, track how many weeks pregnant you are and explore helpful week-by-week guidance — based on NHS practice for the UK and suitable for US & global mums-to-be.

Note: This tracker uses standard clinical rules (EDD = LMP + 280 days) and gives a general guide. It is not a substitute for advice from a midwife, GP or obstetrician.

Pregnancy Week-by-Week Tracker

Pregnancy is one of the most exciting and life-changing journeys a woman can experience. Every week brings new developments for both mother and baby, and having the right support and information can make the process less overwhelming and more enjoyable. Our Pregnancy Week-by-Week Tracker is designed to guide you through each stage of your pregnancy with accurate, easy-to-understand information. Whether you are based in the UK, US, or anywhere else around the world, this tool gives you trusted insights based on NHS UK standards and global medical guidelines.

What is the Pregnancy Week-by-Week Tracker?

The Pregnancy Week-by-Week Tracker is a free online tool that helps you monitor your pregnancy progress, starting from the first day of your last menstrual period. By entering your details, you will receive a week-by-week breakdown of what is happening inside your body and how your baby is developing. The tracker works globally, with useful features tailored for women in the UK, US, and beyond.

Key Features of the Tool

  • Week-by-week pregnancy updates: Track your journey from week 1 to week 42 with clear, detailed explanations.
  • Baby’s development: See how your baby grows each week, including size, weight, and new skills forming inside the womb.
  • Mother’s changes: Learn what changes you may notice in your body, hormones, and emotions.
  • Global accuracy: Based on NHS guidelines for UK audiences and aligned with recommendations for US and international users.
  • Easy to use: Enter your last period date and receive instant updates.
  • Educational tips: Get advice on nutrition, self-care, and what to discuss with your midwife or doctor.

How to Use the Pregnancy Week-by-Week Tracker

Using the tracker is simple. All you need is the first day of your last menstrual period. Enter this date into the tool, and it will calculate which week of pregnancy you are in and provide a detailed breakdown of what to expect. If you are unsure of your last period date, don’t worry—your midwife or GP can help during your antenatal care appointments. Most women in the UK will also have a dating scan at around 12 weeks, which gives a more precise estimate of your pregnancy stage.

Why This Tool is Useful for Expecting Mothers

Many women feel anxious about what is happening to their body and baby during pregnancy. The Pregnancy Week-by-Week Tracker provides reassurance by giving you clear information that evolves each week. It can help you:

  • Understand the growth and development of your baby.
  • Recognise normal pregnancy symptoms and when to seek advice.
  • Learn about antenatal appointments and tests that may be offered.
  • Stay motivated with healthy lifestyle tips for both you and your baby.

Pregnancy Week-by-Week: What to Expect

Here are some highlights from different stages of pregnancy that you can track with our tool:

  • Weeks 1–4: Early pregnancy begins, even before you realise you are pregnant. The fertilised egg implants in the womb.
  • Week 5: The baby’s heart starts to beat, and important organs begin to form.
  • Weeks 6–12: Your baby’s brain, spinal cord, and tiny limbs develop. You may notice morning sickness, tiredness, or mood changes.
  • Weeks 13–20: This is often the most comfortable stage of pregnancy. Your baby may begin to move, and you will start showing a small bump.
  • Weeks 21–28: Your baby’s senses develop, and they begin to respond to sounds. You may feel stronger kicks and movements.
  • Weeks 29–36: Baby gains more weight, and you may experience backache, swelling, or heartburn. Antenatal classes may also be offered during this time.
  • Weeks 37–42: This is considered full-term. Your baby is ready for birth, and you should keep in touch with your midwife or doctor as labour approaches.

Global Relevance

Our Pregnancy Week-by-Week Tracker is not limited to UK audiences. Women in the US and across the globe can also benefit. The tool aligns with trusted health guidelines, ensuring that every expecting mother receives helpful information, no matter where she is based.

Stay Engaged Throughout Your Pregnancy

Pregnancy is a unique journey, and every week counts. By using the tracker, you not only gain knowledge about your baby’s development but also feel more connected to the process. Whether you are curious about when your baby’s heartbeat starts, when you might feel the first kick, or how big your baby is at 30 weeks, this tool offers insights in a simple and reassuring way.

Start Tracking Your Pregnancy Today

Our Pregnancy Week-by-Week Tracker is free, easy to use, and accessible worldwide. Start tracking your pregnancy today to receive trusted, week-by-week guidance on your journey to motherhood.

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