1. What is Conception Date Calculation?

The conception date calculation estimates when fertilization likely occurred based on the due date. It subtracts 266 days (38 weeks) from the due date, representing the typical length of human pregnancy from conception to delivery.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Note: This assumes a standard 38-week (266-day) pregnancy from conception. The calculation may vary slightly for individuals with different gestational periods.

3. Importance of Knowing Conception Date

Details: Knowing the conception date can help determine paternity, understand fetal development milestones, and provide insights into the pregnancy timeline.

4. Using the Calculator

Tips: Enter the estimated due date provided by your healthcare provider. The calculator will estimate when conception likely occurred.

5. Frequently Asked Questions (FAQ)

Q1: Why 266 days?
A: This represents the average 38-week gestation period from conception to delivery (40 weeks from last menstrual period).

Q2: How accurate is this calculation?
A: It provides an estimate. Actual conception dates can vary due to differences in ovulation timing and fetal development.

Q3: What if my due date changes?
A: Recalculate with the new due date. Ultrasound measurements may adjust the estimated due date during pregnancy.

Q4: Does this work for IVF pregnancies?
A: For IVF, the conception date is known precisely based on the procedure date.

Q5: Can this determine the exact day of conception?
A: No, it provides an estimate. Conception typically occurs within a 5-day window around ovulation.