1. What Is The Expected Date Of Pregnancy Calculator?

The Expected Date Of Pregnancy Calculator estimates the due date of pregnancy based on the last menstrual period (LMP) using Naegele's rule. This is the standard method used by healthcare providers to determine the estimated delivery date.

2. How Does The Calculator Work?

The calculator uses the standard pregnancy due date formula:

Where:

• \( EDD \) — Expected Due Date
• \( LMP \) — First day of Last Menstrual Period
• \( 280 \text{ days} \) — Standard pregnancy duration (40 weeks)

Explanation: This calculation assumes a regular 28-day menstrual cycle and that conception occurred approximately 14 days after the LMP. The result represents the estimated date when delivery is most likely to occur.

3. Importance Of Due Date Calculation

Details: Accurate due date estimation is crucial for proper prenatal care, monitoring fetal development, scheduling important tests, and preparing for delivery. It helps healthcare providers track pregnancy progress and identify any potential complications.

4. Using The Calculator

Tips: Enter the first day of your last menstrual period in the date field. Ensure you use the correct date format and select the actual first day of bleeding, not the last day. The calculator will provide both your LMP confirmation and calculated due date.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this due date calculation?
A: This method is accurate for women with regular 28-day cycles. Only about 5% of babies are born on their exact due date, with most deliveries occurring within two weeks before or after.

Q2: What if my menstrual cycle is longer or shorter than 28 days?
A: For cycles longer than 28 days, add the extra days to the due date. For shorter cycles, subtract the difference. Consult your healthcare provider for personalized calculation.

Q3: Can ultrasound change my due date?
A: Yes, early pregnancy ultrasound (especially first trimester) can provide a more accurate due date measurement based on fetal size and development.

Q4: Why is pregnancy calculated from LMP rather than conception?
A: LMP is typically more reliably known than conception date. This standard method ensures consistency in pregnancy dating across healthcare providers.

Q5: What percentage of babies are born on their due date?
A: Only about 4-5% of babies are born exactly on their due date. Most births occur between 37-42 weeks of pregnancy.