Week 39 Pregnancy

Third Trimester

You are 39 weeks pregnant and in your third trimester. Your baby is about the size of a small watermelon. This week's key development: Any Day Now. NHS note: Midwife appointment.

Baby's Development

Your baby is about the size of a small watermelon.

Any Day Now — Your baby is full term. They're well-cushioned with fat, their skull bones are in place, and they're in the best possible position for birth. Braxton Hicks contractions may be more frequent. Rest, nest, and trust your body — it knows exactly what to do.

Illustration of a small watermelon, showing the approximate size of the baby at week 39
Small watermelon
Approx. 50.7cm

Your Symptoms

  • Strong Braxton Hicks
  • Backache
  • Pressure in your pelvis

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

Midwife appointment. They may offer a membrane sweep if you're interested.

Practical Advice for Week 39

Nutrition

  • Continue vitamin D and eat well.
  • Keep snacks accessible — you'll want energy when early labour starts.
  • Isotonic drinks (like Lucozade Sport) are good to sip during labour.
  • Eat normally until contractions become strong and close together.

Exercise

  • Walking can help encourage labour — listen to your body.
  • Birth ball exercises keep the pelvis mobile.
  • Rest between walks — conserve energy.
  • Pelvic floor exercises — yes, still!

Wellbeing

  • Strong Braxton Hicks can feel like early labour — time them.
  • Real contractions get longer, stronger, and closer together.
  • Back pain may increase — a warm bath or shower can help.
  • Trust your body — it has grown this baby and it knows how to birth them.

Preparation

  • Your midwife may offer a membrane sweep to encourage labour.
  • Keep a log of contractions if they start — there are free apps for this.
  • Your birth partner should be on immediate standby.
  • Check your hospital bag one final time — baby's clothes, nappies, car seat.

Tip of the Week

Keep a log of your contractions if they start to feel regular and stronger.

Track Your Due Date

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

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NHS Resources

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

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All Weeks

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

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Week 39 Pregnancy: Symptoms, Baby Development & NHS Advice | DueDate.Baby