Pregnancy Calculation Formula:
| From: | To: |
The Pregnancy Calculator Using Conception Date estimates the due date and current pregnancy progress based on the known conception date. This method provides accurate pregnancy dating when the conception date is certain.
The calculator uses the standard pregnancy calculation formula:
Where:
Explanation: The calculation adds 266 days (38 weeks) to the conception date to determine the estimated due date, and calculates current pregnancy progress from today's date.
Details: Accurate pregnancy dating is essential for proper prenatal care, monitoring fetal development, scheduling important tests, and preparing for delivery.
Tips: Enter the exact conception date in the date field. The calculator will provide the estimated due date and current pregnancy week and day.
Q1: Why 266 days instead of 280 days?
A: 280 days is calculated from the last menstrual period (LMP), while 266 days is from conception date, accounting for the typical 2-week difference.
Q2: How accurate is conception date calculation?
A: When the conception date is known with certainty, this method is very accurate. However, most pregnancies deliver within 2 weeks of the estimated due date.
Q3: What if I don't know my exact conception date?
A: Use the LMP-based calculator which calculates from the first day of your last menstrual period plus 280 days.
Q4: Does this work for IVF pregnancies?
A: Yes, this method is particularly accurate for IVF pregnancies where the conception date is precisely known.
Q5: Why might my due date change during pregnancy?
A: Healthcare providers may adjust due dates based on ultrasound measurements, especially if there's discrepancy with menstrual dating.