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Third Trimester (Weeks 28 - 40) Week 37 of 40
Last reviewed by medical team: June 2026 Evidence-Based Care Check
Fetal Size Comparison

Week 37 Size: Swiss Chard

About the size of a bunch of Swiss chard.

Length 48.6 cm 19.1 inches
Weight 2850 g 100.5 oz

Relative Visual Scale

Solid circle represents your baby's size. Dotted circle shows the full-term week 40 size threshold.

Inside The Womb

Baby's Development

Your pregnancy is now considered 'early term.' The baby's organs are ready to function on their own. The baby is practicing breathing, sucking, and swallowing.

Weekly Milestones

  • Early Term Milestone (37 Weeks)
  • Mucus Plug Loss Possible
Maternal Health

Your Body & Symptoms

You might lose your mucus plug, a gelatinous barrier that seals the cervix. Losing it indicates your cervix is preparing for labor, though labor could still be days or weeks away.

Common Symptoms this Week

Loss of mucus plug (bloody show) Cervical dilation or effacement Nausea or loose stools Braxton Hicks

Doctor & Care Recommendations

  • Watch for signs of active labor: regular contractions that get stronger, closer together, and don't stop when you change positions, or your water breaking.
  • Ensure your pediatrician contact information is finalized.
  • Keep resting and saving your energy.

Weekly Health Guides & Resources

Trimester Guide

Third Trimester Guide

Read comprehensive clinical milestones, screening checklists, and developmental guidelines for this phase.

Explore Trimester →
Common Symptoms

Track & Relieve Symptoms

Learn why symptoms occur, home remedies, and clinical indicators for this week:

Pregnancy Nutrition

Food Safety Checklists

Verify safety statuses, listeria and mercury risks, and safe alternatives for:

Full Nutrition Guide →

Frequently Asked Questions: Week 37

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