1. What is the Due Date Calculator?

The Due Date Calculator estimates the expected delivery date based on the last menstrual period (LMP) using the standard calculation of LMP plus 280 days. This provides an approximate date for when the baby is expected to be born.

2. How Does the Calculator Work?

The calculator uses the standard due date calculation formula:

Where:

• \( EDD \) — Estimated Due Date
• \( LMP \) — Last Menstrual Period
• \( 280 \text{ days} \) — Standard pregnancy duration (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 Due Date Calculation

Details: Accurate due date estimation is crucial for prenatal care planning, monitoring fetal development, scheduling important tests, and preparing for delivery.

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 based on the standard 280-day pregnancy duration.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this due date calculation?
A: This calculation provides an estimate. Only about 5% of babies are born exactly on their due date, with most births occurring within two weeks before or after.

Q2: What if my menstrual cycle is longer or shorter than 28 days?
A: For women with regular cycles that are not 28 days, the due date may need adjustment. Consult with your healthcare provider for personalized calculation.

Q3: Can the due date change during pregnancy?
A: Yes, healthcare providers may adjust the due date based on ultrasound measurements, especially if there's a significant difference from the LMP-based calculation.

Q4: Why is 280 days used as the standard?
A: 280 days represents 40 weeks of pregnancy, calculated from the first day of the last menstrual period rather than conception date.

Q5: When should I confirm my due date with a doctor?
A: It's recommended to schedule your first prenatal appointment as soon as you suspect pregnancy to confirm the due date and begin proper prenatal care.