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Second Trimester (Weeks 14 - 27) Week 16 of 40
Last reviewed by medical team: June 2026 Evidence-Based Care Check
Fetal Size Comparison

Week 16 Size: Avocado

About the size of a ripe avocado.

Length 11.6 cm 4.6 inches
Weight 100 g 3.5 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

The baby's eyes can make slow movements, and the ears are closer to their final position. The nervous system is connecting to the muscles, so movements are becoming coordinated.

Weekly Milestones

  • Quickening (First Movements)
  • Coordinated Limb Control
Maternal Health

Your Body & Symptoms

You may feel the baby move for the first time, a sensation known as 'quickening' (often feels like butterflies or bubbles). Your skin may glow due to increased blood flow.

Common Symptoms this Week

Quickening (first movements) Backaches Growing breasts Dry eyes

Doctor & Care Recommendations

  • Pay close attention to your body to catch those subtle first movements.
  • Wear supportive shoes to help with backaches.
  • Use artificial tears if your eyes feel unusually dry.

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 16

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