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Week-by-Week Pregnancy Calendar

Follow your baby's development, track symptoms, and get essential tips for every week of your 40-week journey.

Find Your Current Pregnancy Week

Don't know your due date? No problem — use your last period or weeks pregnant.

Week 1: First Trimester

Baby Size: No baby yet (menstrual phase)

Week 1 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Body prepares for ovulation

Symptoms

Menstrual bleeding, cramps

Practical Tips

Track cycle, start folic acid

Week 2: First Trimester

Baby Size: No embryo yet

Week 2 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Ovulation occurs

Symptoms

Increased cervical mucus

Practical Tips

Plan intercourse during fertile window

Week 3: First Trimester

Baby Size: Pinhead (fertilized egg)

Week 3 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Fertilization and cell division

Symptoms

Mild cramping, spotting

Practical Tips

Avoid alcohol and smoking

Week 4: First Trimester

Baby Size: Poppy seed (~1 mm)

Week 4 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Implantation occurs

Symptoms

Missed period, light spotting

Practical Tips

Take pregnancy test

Week 5: First Trimester

Baby Size: Sesame seed (~2 mm)

Week 5 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Heart begins forming

Symptoms

Nausea, fatigue

Practical Tips

Eat small frequent meals

Week 6: First Trimester

Baby Size: Lentil (~4 mm)

Week 6 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Heartbeat may begin

Symptoms

Morning sickness, breast tenderness

Practical Tips

Stay hydrated

Week 7: First Trimester

Baby Size: Blueberry (~1 cm)

Week 7 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Brain and face developing

Symptoms

Fatigue, nausea

Practical Tips

Get enough rest

Week 8: First Trimester

Baby Size: Raspberry (~1.6 cm)

Week 8 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Limbs forming, brain growth

Symptoms

Nausea, mood swings

Practical Tips

Maintain healthy diet

Week 9: First Trimester

Baby Size: Cherry (~2.3 cm)

Week 9 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Facial features forming

Symptoms

Bloating, fatigue

Practical Tips

Continue prenatal vitamins

Week 10: First Trimester

Baby Size: Strawberry (~3 cm)

Week 10 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Organs forming

Symptoms

Nausea, dizziness

Practical Tips

Avoid raw foods

Planning for your new arrival?

Get our Complete Getting Pregnant Guide for deep insights into every stage of your journey.

Download PDF Guide

Week 11: First Trimester

Baby Size: Fig (~4 cm)

Week 11 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Bones hardening

Symptoms

Fatigue reducing

Practical Tips

Stay active

Week 12: First Trimester

Baby Size: Lime (~5 cm)

Week 12 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Reflexes developing

Symptoms

Less nausea

Practical Tips

Schedule checkup

Week 13: First Trimester

Baby Size: Peach (~7 cm)

Week 13 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Vocal cords forming

Symptoms

Energy returns

Practical Tips

Start light exercise

Week 14: Second Trimester

Baby Size: Lemon (~9 cm)

Week 14 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Facial expressions begin

Symptoms

Reduced nausea

Practical Tips

Eat balanced diet

Week 15: Second Trimester

Baby Size: Apple (~10 cm)

Week 15 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Skeleton developing

Symptoms

Mild aches

Practical Tips

Calcium intake

Week 16: Second Trimester

Baby Size: Avocado (~11.5 cm)

Week 16 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Muscle movement

Symptoms

Possible baby movement

Practical Tips

Stay hydrated

Week 17: Second Trimester

Baby Size: Turnip (~13 cm)

Week 17 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Fat layer forming

Symptoms

Increased appetite

Practical Tips

Healthy snacks

Week 18: Second Trimester

Baby Size: Bell pepper (~14 cm)

Week 18 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Hearing develops

Symptoms

Baby kicks

Practical Tips

Talk to baby

Week 19: Second Trimester

Baby Size: Mango (~15 cm)

Week 19 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Sensory development

Symptoms

Skin changes

Practical Tips

Moisturize skin

Week 20: Second Trimester

Baby Size: Banana (~16 cm)

Week 20 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Halfway milestone

Symptoms

Visible bump

Practical Tips

Anatomy scan

Planning for your new arrival?

Get our Complete Getting Pregnant Guide for deep insights into every stage of your journey.

Download PDF Guide

Week 21: Second Trimester

Baby Size: Carrot (~27 cm)

Week 21 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Digestive system developing

Symptoms

Stretch marks

Practical Tips

Stay hydrated

Week 22: Second Trimester

Baby Size: Papaya (~28 cm)

Week 22 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Eyes forming

Symptoms

Back pain

Practical Tips

Posture care

Week 23: Second Trimester

Baby Size: Grapefruit (~29 cm)

Week 23 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Lungs developing

Symptoms

Swelling

Practical Tips

Elevate feet

Week 24: Second Trimester

Baby Size: Corn (~30 cm)

Week 24 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Hearing strong

Symptoms

Braxton Hicks

Practical Tips

Hydration

Week 25: Second Trimester

Baby Size: Cauliflower (~34 cm)

Week 25 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Brain growth

Symptoms

Sleep issues

Practical Tips

Side sleeping

Week 26: Second Trimester

Baby Size: Zucchini (~35 cm)

Week 26 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Eyes open

Symptoms

Leg cramps

Practical Tips

Stretching

Week 27: Second Trimester

Baby Size: Lettuce (~36 cm)

Week 27 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Rapid brain growth

Symptoms

Heartburn

Practical Tips

Small meals

Week 28: Third Trimester

Baby Size: Eggplant (~37 cm)

Week 28 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Nervous system develops

Symptoms

Shortness of breath

Practical Tips

Rest often

Week 29: Third Trimester

Baby Size: Butternut squash (~38 cm)

Week 29 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Muscle growth

Symptoms

Fatigue

Practical Tips

Iron-rich foods

Week 30: Third Trimester

Baby Size: Cabbage (~39 cm)

Week 30 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Fat accumulation

Symptoms

Back pain

Practical Tips

Support belt

Planning for your new arrival?

Get our Complete Getting Pregnant Guide for deep insights into every stage of your journey.

Download PDF Guide

Week 31: Third Trimester

Baby Size: Coconut (~41 cm)

Week 31 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Brain connections increase

Symptoms

Frequent urination

Practical Tips

Stay hydrated

Week 32: Third Trimester

Baby Size: Jicama (~42 cm)

Week 32 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Bones fully formed

Symptoms

Braxton Hicks

Practical Tips

Relaxation

Week 33: Third Trimester

Baby Size: Pineapple (~43 cm)

Week 33 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Immune system develops

Symptoms

Swelling

Practical Tips

Reduce salt

Week 34: Third Trimester

Baby Size: Cantaloupe (~45 cm)

Week 34 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Lungs maturing

Symptoms

Pelvic pressure

Practical Tips

Rest

Week 35: Third Trimester

Baby Size: Honeydew (~46 cm)

Week 35 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Weight gain increases

Symptoms

Fatigue

Practical Tips

Prepare hospital bag

Week 36: Third Trimester

Baby Size: Romaine lettuce (~47 cm)

Week 36 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Baby drops lower

Symptoms

Breathing easier

Practical Tips

Watch for labor signs

Week 37: Third Trimester

Baby Size: Swiss chard (~48 cm)

Week 37 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Full-term begins

Symptoms

Contractions

Practical Tips

Stay ready

Week 38: Third Trimester

Baby Size: Leek (~49 cm)

Week 38 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Organs ready

Symptoms

Pelvic pain

Practical Tips

Rest

Week 39: Third Trimester

Baby Size: Mini watermelon (~50 cm)

Week 39 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Ready for birth

Symptoms

Strong contractions

Practical Tips

Contact doctor if labor starts

Week 40: Third Trimester

Baby Size: Watermelon (~51 cm)

Week 40 Pregnancy: Baby Development, Symptoms & Tips

Baby Development

Fully developed

Symptoms

Labor signs

Practical Tips

Delivery expected

How to Use This Pregnancy Calendar

Our week-by-week pregnancy calendar is designed to be your companion from the moment you decide to conceive until you meet your little one. You can track baby development by week, identify which pregnancy symptoms by week are normal, and prepare for the pregnancy stages week by week.

When Does Pregnancy Growth Really Start?

While the first two weeks of the pregnancy growth chart week by week are technically before conception, by what happens at 8 weeks pregnant, your baby already has a heartbeat and developing organs. This fetal development timeline provides the essential milestones for every stage.