Pregnancy Guide

25 Weeks Pregnant

Your baby is the size of a Cauliflower (Small). Discover exactly what is happening to your body and your baby this week.

New pregnancy guide: Learn how weeks are counted, what each trimester means, and how to interpret your calculator results for better preparation and planning. Read the full guide
Medical & Editorial Review
Content reviewed against NHS and ACOG clinical guidelines.
Last reviewed: August 2026. This information is for educational purposes only and does not substitute professional medical advice. Always consult your healthcare provider.

Week 25 in detail

Fingerprints done — hiccups you might feel

Baby this week

Hands are fully formed with unique fingerprints. Hair can show pigment. The baby responds to sound and touch through the wall. Lungs are still lining with surfactant. Nostrils that were plugged begin to open.

  • A rhythmic pulse in the bump is often hiccups — usually harmless
  • Capillaries fill; skin looks pinker on medical photos
  • Survival with NICU support is better than a week ago, still specialised

Your body this week

Pelvic girdle pain (including SPD) can bite: relaxin loosens joints that then have to carry a heavier front. Getting out of a car with knees together is unglamorous and kind to the pubic joint. Wrist tingling (carpal tunnel) is extra fluid, not a failing nerve forever.

  • A support belt helps some; a pelvic physiotherapist helps more
  • Night splints for numb hands are allowed
  • Glucose testing may still be pending — do not skip it

Get ready

Talk birth preferences while you can still think in full sentences — a plan is a conversation, not a contract. The checklist above is yoga, the conversation, and wrists. Link pain that stops you walking to a clinician, not only to Amazon belts.

A general guide, not medical advice. Scan timing and symptoms vary — ask your clinician.

Baby Growth Curve

This chart visualizes the average length of the baby from week 1 to 40. Values are based on standard clinical averages.

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