Pregnancy Due Date Calculator - Track Your Pregnancy Week by Week

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📅 Pregnancy Trimesters Explained

🌱 First Trimester (Weeks 1-13)

Key Developments: Fertilization, implantation, and major organ formation. Baby grows from a single cell to about 3 inches long.

Common Symptoms: Morning sickness, fatigue, breast tenderness, frequent urination, mood swings.

Important Milestones: First prenatal visit, first ultrasound (8-12 weeks), hearing baby's heartbeat, end of highest miscarriage risk period.

💗 Second Trimester (Weeks 14-27)

Key Developments: Rapid growth, movements begin, organs mature. Baby grows to about 14 inches and 2 pounds.

Common Symptoms: Energy returns, visible baby bump, feeling baby move (quickening), reduced nausea.

Important Milestones: Anatomy scan (18-22 weeks), gender reveal possible, glucose screening test (24-28 weeks).

🎀 Third Trimester (Weeks 28-40+)

Key Developments: Rapid weight gain, lung maturation, positioning for birth. Baby reaches 19-21 inches and 6-9 pounds.

Common Symptoms: Back pain, shortness of breath, frequent urination, Braxton Hicks contractions, swelling.

Important Milestones: Weekly checkups begin (36 weeks), baby drops into pelvis, full-term at 37 weeks, delivery!

🎯 Weekly Pregnancy Milestones

Week 4-5: Positive Test

You can now detect pregnancy with a home test. The embryo is about the size of a sesame seed. Heart begins to beat.

Week 8-10: First Ultrasound

Baby is now called a fetus. All major organs have begun forming. You can see the heartbeat on ultrasound!

Week 12: End of First Trimester

Miscarriage risk drops significantly. Baby is fully formed but needs to grow and mature. About 2.5 inches long.

Week 18-20: Anatomy Scan

Detailed ultrasound checks all organs and structures. Gender can usually be determined. Baby is about 10 inches long.

Week 24: Viability

Baby could potentially survive with medical help if born. Lungs begin producing surfactant. Weighs about 1.3 pounds.

Week 28: Third Trimester

Baby's eyes can open and close. Brain development accelerates. Survival rate is over 90% if born. About 2.5 pounds.

Week 32: Positioning

Baby starts moving into head-down position. Bones are fully formed but still soft. Weighs about 4 pounds.

Week 37: Full Term

Baby is considered full term! Organs are mature enough for life outside the womb. Average weight: 6.5 pounds.

Week 40: Due Date

Your estimated due date! Only 5% of babies are born exactly on their due date. Most arrive within 2 weeks before or after.

💡 Important Pregnancy Tips

🏥 Prenatal Care

Attend all prenatal appointments. First visit should be at 8-10 weeks. Visits increase in frequency as pregnancy progresses.

💊 Prenatal Vitamins

Take prenatal vitamins daily, especially folic acid (400-800 mcg) to prevent neural tube defects. Start before conception if possible.

🍎 Nutrition

Eat a balanced diet rich in fruits, vegetables, whole grains, and lean proteins. Avoid raw fish, deli meats, and unpasteurized dairy.

💧 Hydration

Drink 8-12 glasses of water daily. Proper hydration helps with amniotic fluid levels and reduces swelling and constipation.

🏃‍♀️ Exercise

Stay active with pregnancy-safe exercises like walking, swimming, or prenatal yoga. Aim for 30 minutes most days of the week.

😴 Rest

Get plenty of sleep (7-9 hours). Sleep on your left side in later pregnancy to optimize blood flow to baby. Use pillows for support.