1. What is the Pregnancy Calculator?

The Pregnancy Calculator estimates the due date based on the last menstrual period (LMP) using the standard calculation of LMP plus 280 days. This provides an approximate delivery date for pregnancy planning and monitoring.

2. How Does the Calculator Work?

The calculator uses the standard pregnancy calculation formula:

Where:

• \( LMP \) — Last Menstrual Period (start date)
• \( 280\ days \) — Standard pregnancy duration (40 weeks)

Explanation: This calculation assumes a regular 28-day menstrual cycle and ovulation occurring on day 14. The 280 days represent 40 weeks of gestation.

3. Importance of Due Date Calculation

Details: Accurate due date estimation is crucial for proper prenatal care, monitoring fetal development, planning for delivery, and identifying potential pregnancy complications.

4. Using the Calculator

Tips: Enter the first day of your last menstrual period. Ensure the date is accurate for the most reliable due date estimation.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is the LMP method?
A: The LMP method provides a good estimate but may vary by ±2 weeks. Early ultrasound dating is more accurate.

Q2: What if I have irregular periods?
A: For irregular cycles, the LMP method may be less accurate. An early dating ultrasound is recommended.

Q3: Why 280 days specifically?
A: 280 days represents 40 weeks of gestation, calculated from the first day of the last menstrual period.

Q4: Can the due date change?
A: Yes, healthcare providers may adjust the due date based on ultrasound measurements, especially 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.