Pregnancy Calendar

Follow your baby's development and get essential tips for every week of your journey.

Weekly Tracker
Clinic-backed

Weekly guide will appear here

Select your method and enter dates to unlock your guide.

Current Week — waiting for your data
Trimester — waiting for your data
Baby Size — waiting for your data
Estimated Due Date — waiting for your data
Week 1 Week 2 Week 3 Week 4 Week 5 Week 6 Week 7 Week 8 Week 9 Week 10 Week 11 Week 12 Week 13 Week 14 Week 15 Week 16 Week 17 Week 18 Week 19 Week 20 Week 21 Week 22 Week 23 Week 24 Week 25 Week 26 Week 27 Week 28 Week 29 Week 30 Week 31 Week 32 Week 33 Week 34 Week 35 Week 36 Week 37 Week 38 Week 39 Week 40

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

Check Your Due Date Track Your Ovulation Pregnancy Chances

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

Check Your Due Date Track Your Ovulation Pregnancy Chances

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

Check Your Due Date Track Your Ovulation Pregnancy Chances

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

Check Your Due Date Track Your Ovulation Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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

Check Your Due Date Pregnancy Chances

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.

const weekData = {"1":{"size":"No baby yet (menstrual phase)","development":"Body prepares for ovulation","symptoms":"Menstrual bleeding, cramps","tips":"Track cycle, start folic acid"},"2":{"size":"No embryo yet","development":"Ovulation occurs","symptoms":"Increased cervical mucus","tips":"Plan intercourse during fertile window"},"3":{"size":"Pinhead (fertilized egg)","development":"Fertilization and cell division","symptoms":"Mild cramping, spotting","tips":"Avoid alcohol and smoking"},"4":{"size":"Poppy seed (~1 mm)","development":"Implantation occurs","symptoms":"Missed period, light spotting","tips":"Take pregnancy test"},"5":{"size":"Sesame seed (~2 mm)","development":"Heart begins forming","symptoms":"Nausea, fatigue","tips":"Eat small frequent meals"},"6":{"size":"Lentil (~4 mm)","development":"Heartbeat may begin","symptoms":"Morning sickness, breast tenderness","tips":"Stay hydrated"},"7":{"size":"Blueberry (~1 cm)","development":"Brain and face developing","symptoms":"Fatigue, nausea","tips":"Get enough rest"},"8":{"size":"Raspberry (~1.6 cm)","development":"Limbs forming, brain growth","symptoms":"Nausea, mood swings","tips":"Maintain healthy diet"},"9":{"size":"Cherry (~2.3 cm)","development":"Facial features forming","symptoms":"Bloating, fatigue","tips":"Continue prenatal vitamins"},"10":{"size":"Strawberry (~3 cm)","development":"Organs forming","symptoms":"Nausea, dizziness","tips":"Avoid raw foods"},"11":{"size":"Fig (~4 cm)","development":"Bones hardening","symptoms":"Fatigue reducing","tips":"Stay active"},"12":{"size":"Lime (~5 cm)","development":"Reflexes developing","symptoms":"Less nausea","tips":"Schedule checkup"},"13":{"size":"Peach (~7 cm)","development":"Vocal cords forming","symptoms":"Energy returns","tips":"Start light exercise"},"14":{"size":"Lemon (~9 cm)","development":"Facial expressions begin","symptoms":"Reduced nausea","tips":"Eat balanced diet"},"15":{"size":"Apple (~10 cm)","development":"Skeleton developing","symptoms":"Mild aches","tips":"Calcium intake"},"16":{"size":"Avocado (~11.5 cm)","development":"Muscle movement","symptoms":"Possible baby movement","tips":"Stay hydrated"},"17":{"size":"Turnip (~13 cm)","development":"Fat layer forming","symptoms":"Increased appetite","tips":"Healthy snacks"},"18":{"size":"Bell pepper (~14 cm)","development":"Hearing develops","symptoms":"Baby kicks","tips":"Talk to baby"},"19":{"size":"Mango (~15 cm)","development":"Sensory development","symptoms":"Skin changes","tips":"Moisturize skin"},"20":{"size":"Banana (~16 cm)","development":"Halfway milestone","symptoms":"Visible bump","tips":"Anatomy scan"},"21":{"size":"Carrot (~27 cm)","development":"Digestive system developing","symptoms":"Stretch marks","tips":"Stay hydrated"},"22":{"size":"Papaya (~28 cm)","development":"Eyes forming","symptoms":"Back pain","tips":"Posture care"},"23":{"size":"Grapefruit (~29 cm)","development":"Lungs developing","symptoms":"Swelling","tips":"Elevate feet"},"24":{"size":"Corn (~30 cm)","development":"Hearing strong","symptoms":"Braxton Hicks","tips":"Hydration"},"25":{"size":"Cauliflower (~34 cm)","development":"Brain growth","symptoms":"Sleep issues","tips":"Side sleeping"},"26":{"size":"Zucchini (~35 cm)","development":"Eyes open","symptoms":"Leg cramps","tips":"Stretching"},"27":{"size":"Lettuce (~36 cm)","development":"Rapid brain growth","symptoms":"Heartburn","tips":"Small meals"},"28":{"size":"Eggplant (~37 cm)","development":"Nervous system develops","symptoms":"Shortness of breath","tips":"Rest often"},"29":{"size":"Butternut squash (~38 cm)","development":"Muscle growth","symptoms":"Fatigue","tips":"Iron-rich foods"},"30":{"size":"Cabbage (~39 cm)","development":"Fat accumulation","symptoms":"Back pain","tips":"Support belt"},"31":{"size":"Coconut (~41 cm)","development":"Brain connections increase","symptoms":"Frequent urination","tips":"Stay hydrated"},"32":{"size":"Jicama (~42 cm)","development":"Bones fully formed","symptoms":"Braxton Hicks","tips":"Relaxation"},"33":{"size":"Pineapple (~43 cm)","development":"Immune system develops","symptoms":"Swelling","tips":"Reduce salt"},"34":{"size":"Cantaloupe (~45 cm)","development":"Lungs maturing","symptoms":"Pelvic pressure","tips":"Rest"},"35":{"size":"Honeydew (~46 cm)","development":"Weight gain increases","symptoms":"Fatigue","tips":"Prepare hospital bag"},"36":{"size":"Romaine lettuce (~47 cm)","development":"Baby drops lower","symptoms":"Breathing easier","tips":"Watch for labor signs"},"37":{"size":"Swiss chard (~48 cm)","development":"Full-term begins","symptoms":"Contractions","tips":"Stay ready"},"38":{"size":"Leek (~49 cm)","development":"Organs ready","symptoms":"Pelvic pain","tips":"Rest"},"39":{"size":"Mini watermelon (~50 cm)","development":"Ready for birth","symptoms":"Strong contractions","tips":"Contact doctor if labor starts"},"40":{"size":"Watermelon (~51 cm)","development":"Fully developed","symptoms":"Labor signs","tips":"Delivery expected"}}; document.addEventListener('DOMContentLoaded', function() { // Tab switching logic const tabBtns = document.querySelectorAll('.hero-tab-btn'); tabBtns.forEach(btn => { btn.addEventListener('click', () => { tabBtns.forEach(b => { b.classList.remove('active'); b.style.color = 'rgba(255,255,255,0.6)'; }); btn.classList.add('active'); btn.style.color = '#fff'; document.querySelectorAll('.hero-tab-content').forEach(c => c.style.display = 'none'); document.getElementById(btn.dataset.tab).style.display = 'block'; }); }); }); function processCalculationHero() { const activeTab = document.querySelector('.hero-tab-btn.active').dataset.tab; const today = new Date(); today.setHours(0,0,0,0); let lmpDate, dueDate, week, dayOfWeek; if (activeTab === 'tab-lmp') { const lmpValue = document.getElementById('lmpInput').value; if (!lmpValue) return alert("Please select your last period date."); lmpDate = new Date(lmpValue); lmpDate.setHours(0,0,0,0); const diffTime = today - lmpDate; const daysPassed = Math.floor(diffTime / (1000 * 60 * 60 * 24)); week = Math.floor(daysPassed / 7); dueDate = new Date(lmpDate); dueDate.setDate(lmpDate.getDate() + 280); } else if (activeTab === 'tab-duedate') { const dueValue = document.getElementById('dueDateInput').value; if (!dueValue) return alert("Please select your due date."); dueDate = new Date(dueValue); dueDate.setHours(0,0,0,0); lmpDate = new Date(dueDate); lmpDate.setDate(dueDate.getDate() - 280); const diffTime = today - lmpDate; const daysPassed = Math.floor(diffTime / (1000 * 60 * 60 * 24)); week = Math.floor(daysPassed / 7); } else if (activeTab === 'tab-weeks') { week = parseInt(document.getElementById('weeksInput').value); const totalDays = week * 7; lmpDate = new Date(today); lmpDate.setDate(today.getDate() - totalDays); dueDate = new Date(lmpDate); dueDate.setDate(lmpDate.getDate() + 280); } // Safety Clamps if (week < 1) week = 1; if (week > 40) week = 40; let trimester = week <= 13 ? "First Trimester" : (week <= 27 ? "Second Trimester" : "Third Trimester"); const options = { month: 'short', day: 'numeric', year: 'numeric' }; // Update UI document.getElementById('resWeekNum').textContent = week; document.getElementById('resTrimesterBadge').textContent = trimester; document.getElementById('resBabySize').textContent = weekData[week].size; document.getElementById('resDueDate').textContent = dueDate.toLocaleDateString('en-US', options); document.getElementById('resMilestone').textContent = weekData[week].development; document.getElementById('resTip').textContent = weekData[week].tips; document.getElementById('waitingState').style.display = 'none'; document.getElementById('resultsState').style.display = 'flex'; document.getElementById('resultsPanel').classList.add('results-active'); // Scroll to card const target = document.getElementById('week-' + week); if (target) { document.querySelectorAll('.week-card').forEach(c => c.classList.remove('week-highlight')); target.classList.add('week-highlight'); if (window.innerWidth < 992) { document.getElementById('resultsPanel').scrollIntoView({ behavior: 'smooth' }); } else { target.scrollIntoView({ behavior: 'smooth', block: 'center' }); } } } // Progress Bar & Scroll Highlighting window.onscroll = function() { let winScroll = document.body.scrollTop || document.documentElement.scrollTop; let height = document.documentElement.scrollHeight - document.documentElement.clientHeight; let scrolled = (winScroll / height) * 100; document.getElementById("pageProgress").style.width = scrolled + "%"; // Update Nav Highlight const sections = document.querySelectorAll('.week-card'); const navBtns = document.querySelectorAll('.week-btn'); let current = ""; sections.forEach(section => { const sectionTop = section.offsetTop; if (winScroll >= sectionTop - 150) { current = section.getAttribute('id'); } }); navBtns.forEach(btn => { btn.classList.remove('active'); if (btn.getAttribute('href') === "#" + current) { btn.classList.add('active'); btn.scrollIntoView({ behavior: 'smooth', block: 'nearest', inline: 'center' }); } }); };

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Medical Disclaimer: This tool is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider for personalized guidance about your fertility and pregnancy.