How big is baby at 20 weeks?

About 25cm long and 300g - approximately the size of a banana at 20 weeks.

When can I feel baby move?

First-time mothers feel movement between 18-25 weeks. Second-time mothers often feel earlier around 16 weeks.

Is baby fully formed at 12 weeks?

Yes. All major organs and features are formed by 12 weeks. Remaining months are for growth and maturation.

Pregnancy Week Images — Baby Size & Development by Week

About This Tool

This tool provides helpful women health information based on medically validated data. Our goal is to empower women with accurate, accessible health information for every stage of their reproductive journey.

Medical Disclaimer: All tools on Bloom Health Woman are for educational purposes only. Always consult a qualified healthcare provider for medical advice.

Your Baby Week by Week — Size and Development

Watching your baby grow from a tiny cluster of cells to a fully formed newborn over 40 weeks is one of the most remarkable biological processes in nature. Our week-by-week visual guide shows you what your baby looks like, what size they are, and what developmental milestones are happening right now.

Baby Size Comparisons by Week

Week 6: Lentil — 0.6cm, heart beating
Week 8: Raspberry — 1.6cm, all major organs forming
Week 10: Strawberry — 3.1cm, tiny fingers and toes
Week 12: Lime — 5.4cm, can make facial expressions
Week 16: Avocado — 11.6cm, can hear sounds
Week 20: Banana — 25cm, halfway! Kicks felt
Week 24: Ear of corn — 30cm, viable outside womb
Week 28: Eggplant — 37.6cm, eyes opening
Week 32: Squash — 42.4cm, practicing breathing
Week 36: Honeydew melon — 47.4cm, head engaging
Week 40: Pumpkin — ~50cm, ready to arrive!

How big is my baby at 20 weeks?

At 20 weeks, your baby is approximately 25cm (10 inches) long and weighs around 300 grams — about the size of a banana. You're halfway through your pregnancy!

When can I feel my baby move?

First-time mothers typically feel first movements (quickening) between 18–25 weeks. Women who've been pregnant before may notice them earlier, from around 16 weeks.

Is my baby fully formed at 12 weeks?

By 12 weeks, all major organs, limbs, and facial features are formed. For the remainder of pregnancy, the baby grows larger and the systems mature. This is why first trimester is the most critical for development.

Pregnancy Week Images