1. What is the Pregnancy Calculator?

The Pregnancy Calculator estimates the due date based on the last menstrual period using the standard calculation method of adding 280 days (40 weeks) to the LMP date.

2. How Does the Calculator Work?

The calculator uses the pregnancy calculation formula:

Where:

• \( EDD \) — Estimated Due Date
• \( LMP \) — Last Menstrual Period
• \( 280 \) — Standard pregnancy duration in days (40 weeks)

Explanation: This calculation is based on Naegele's rule, which assumes a 28-day menstrual cycle and ovulation occurring on day 14.

3. Importance of EDD Calculation

Details: Accurate due date estimation is crucial for monitoring fetal development, scheduling prenatal care, 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. The calculator will automatically compute your estimated due date. Ensure the date is accurate for the most reliable result.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculation method?
A: This method provides a general estimate. Actual delivery dates can vary by ±2 weeks from the calculated due date.

Q2: What if my menstrual cycle is longer or shorter than 28 days?
A: For women with irregular cycles, ultrasound dating in early pregnancy may provide a more accurate due date estimate.

Q3: When should I confirm my due date with a healthcare provider?
A: It's recommended to schedule your first prenatal appointment within the first 8-10 weeks of pregnancy to confirm dating.

Q4: Can the due date change during pregnancy?
A: Yes, healthcare providers may adjust the due date based on early ultrasound measurements, which are most accurate in the first trimester.

Q5: What percentage of babies are born on their due date?
A: Only about 5% of babies are born exactly on their due date. Most are born within two weeks before or after the estimated date.