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Second Trimester (Weeks 14 - 27) Week 18 of 40
Last reviewed by medical team: June 2026 Evidence-Based Care Check
Fetal Size Comparison

Week 18 Size: Artichoke

About the size of an artichoke.

Length 14.2 cm 5.6 inches
Weight 190 g 6.7 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

The baby's ears stand out from the head, and they can hear external sounds. The baby may be startled by loud noises. A protective coating called vernix caseosa begins to cover the skin.

Weekly Milestones

  • Vernix Coating Starts
  • External Hearing Active
Maternal Health

Your Body & Symptoms

Your uterus is now about the height of your belly button. You might feel your baby kick, roll, or punch more clearly now.

Common Symptoms this Week

Clearer fetal movements Dizziness Swollen feet or ankles Leg cramps, especially at night

Doctor & Care Recommendations

  • Elevate your feet whenever you sit down to reduce swelling.
  • Stretch your calves before bed to prevent night cramps.
  • Schedule your anatomy scan (usually done between weeks 18 and 22).

Weekly Health Guides & Resources

Trimester Guide

Second 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 18

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