Pregnancy Milestones

How to Use the Pregnancy Calculator

Using LMP Date (Most Common)

Enter the first day of your last menstrual period and your typical cycle length. The calculator will estimate your due date 280 days (40 weeks) after LMP.

Using Conception Date

If you know your conception or ovulation date, enter it directly. The calculator will estimate your due date 266 days (38 weeks) after conception.

Using Ultrasound Date

If you had an early ultrasound, enter the date and the number of weeks shown. The calculator will estimate your due date based on the measurement.

Understanding Results

• Due Date: Your estimated date of delivery
• Current Week: How many weeks pregnant you are now
• Trimester: Which trimester (1st, 2nd, or 3rd) you're in
• Days Until Due: How many days until your due date
• Estimated LMP: Calculated first day of last period
• Progress: Percentage of pregnancy completed

Important Notes

Due Date Accuracy

Due dates are estimates. Only about 5% of babies are born on their exact due date. Most babies are born within 2 weeks before or after the due date. This is completely normal and expected.

Regular Ultrasounds

Early ultrasounds (8-13 weeks) are most accurate for dating pregnancy (±3-5 days). Later ultrasounds are less accurate. Your doctor will use ultrasound to confirm or adjust your due date.

When to Contact Your Doctor

• Any vaginal bleeding or spotting
• Severe abdominal pain or cramping
• Dizziness or fainting
• Severe headaches or vision changes
• Sudden swelling or chest pain

Understanding Pregnancy Weeks and Trimesters

First Trimester (Weeks 1-13)

The first trimester spans from the first day of your last period through the end of week 13. This is when most women find out they're pregnant and when the baby develops basic organs and systems. Morning sickness, fatigue, and mood changes are common.

Second Trimester (Weeks 14-27)

The second trimester is often called the "golden period" of pregnancy. Morning sickness usually subsides, and you'll start showing. You may feel the baby kick and can learn the baby's sex on ultrasound. The risk of miscarriage decreases significantly.

Third Trimester (Weeks 28-40+)

The third trimester is the home stretch. The baby continues to grow and gain weight. You may experience frequent contractions, back pain, and difficulty sleeping. The baby drops lower into the pelvis in preparation for birth.

Counting Pregnancy Weeks

Pregnancy weeks are counted from the first day of your last menstrual period (LMP), even though conception typically occurs 2 weeks later. This is why doctors count pregnancy in weeks, and "40 weeks" is considered full term.

Pregnancy Care Tips

Nutrition

Eat a balanced diet with plenty of fruits, vegetables, whole grains, and proteins. Take prenatal vitamins with folic acid as recommended by your doctor.

Exercise

Stay active with moderate exercise like walking, swimming, or prenatal yoga. Always consult your doctor before starting any new exercise routine.

Sleep & Rest

Aim for 7-9 hours of sleep per night. Sleeping on your left side is ideal during later pregnancy to improve blood flow.

Regular Checkups

Attend all prenatal appointments. Regular monitoring ensures both you and baby are healthy.

Avoid

• Smoking, alcohol, and recreational drugs
• Raw or undercooked meats, unpasteurized dairy
• Excess caffeine (limit to 200mg daily)
• High-stress situations when possible

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Frequently Asked Questions