Pregnancy Guide

27 Weeks Pregnant

Your baby is the size of a Cabbage (Medium). 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

Week 27 in detail

Third trimester — practice breaths in water

Baby this week

The third trimester begins. Lungs are maturing but still need weeks. The baby inhales and exhales amniotic fluid (practice). Fat is rounding the body. You will feel more rolls than ballet.

  • Practice breathing is still fluid, not air
  • The brain is gaining grooves; every extra week still matters
  • Hiccups and startles are common and usually reassuring

Your body this week

Sleep gets worse: heartburn, cramps, toilet trips, a bump that has opinions. A U-shaped pillow is equipment. Shortness of breath on stairs is common; shortness of breath at rest with chest pain is urgent.

  • Left-side sleep with a pillow between the knees is the usual prescription
  • Leg cramps at night: stretch the calf, then drink; mention them if they are constant
  • Baby clothes can be washed in gentle detergent whenever you have a burst of energy

Get ready

Set up the pillow situation this week, not at 35 weeks on a desperate delivery van. The checklist above is pillow, laundry, and breathing. If you cannot catch your breath lying down, seek care.

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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