1. What is EDD Conception LMP?

EDD Conception LMP calculates the estimated due date (EDD) using either conception date or last menstrual period (LMP). It provides healthcare providers and expectant parents with an accurate prediction of when the baby is likely to be born.

2. How Does the Calculator Work?

The calculator uses two primary methods:

Where:

• EDD — Estimated Due Date
• Conception Date — The actual date of conception
• LMP — First day of Last Menstrual Period
• 266 days — Average gestation from conception
• 280 days — Average gestation from LMP (40 weeks)

Explanation: The 280-day method from LMP is more commonly used as conception date is often unknown, while the 266-day method provides accuracy when conception date is known.

3. Importance of EDD Calculation

Details: Accurate EDD calculation is crucial for prenatal care planning, monitoring fetal development, scheduling important tests, and preparing for delivery. It helps identify preterm or post-term pregnancies.

4. Using the Calculator

Tips: Select your calculation method (conception date or LMP), enter the corresponding date, and click calculate. Use the method for which you have the most accurate information.

5. Frequently Asked Questions (FAQ)

Q1: Which method is more accurate?
A: The conception date method is more precise when the exact conception date is known, but LMP method is more commonly used in clinical practice.

Q2: Why 280 days from LMP instead of 266?
A: Pregnancy is traditionally calculated from LMP, which includes approximately 2 weeks before actual conception occurs.

Q3: How accurate are these calculations?
A: Only about 5% of babies are born exactly on their due date. Most births occur within 2 weeks before or after the calculated EDD.

Q4: What if my cycles are irregular?
A: For women with irregular cycles, early ultrasound dating is more accurate than LMP-based calculations.

Q5: Can the due date change during pregnancy?
A: Yes, healthcare providers may adjust the EDD based on ultrasound measurements, especially if there's significant discrepancy from LMP-based calculation.