1. What is the Day I Got Pregnant Calculator?

The Day I Got Pregnant Calculator estimates the conception date based on your estimated due date (EDD). It calculates backwards 266 days from your due date to determine the approximate day when conception occurred.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• \( \text{EDD} \) — Estimated Due Date (from ultrasound or last menstrual period)
• \( 266 \text{ days} \) — Standard gestation period from conception to due date

Explanation: This calculation is based on the average pregnancy duration of 266 days from conception to birth, or 280 days from the first day of the last menstrual period.

3. Importance of Knowing Conception Date

Details: Knowing your conception date helps track fetal development milestones, provides insight into your pregnancy timeline, and can be useful for medical and personal records.

4. Using the Calculator

Tips: Enter your estimated due date as provided by your healthcare provider. The calculator will automatically determine the approximate conception date.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculation?
A: This provides an estimate based on average gestation. Actual conception dates may vary by a few days depending on individual factors.

Q2: Why 266 days instead of 280?
A: 280 days is calculated from the last menstrual period, while 266 days is from actual conception (assuming ovulation around day 14 of the cycle).

Q3: Can I use this if I know my ovulation date?
A: If you know your exact ovulation date, that would be a more precise conception date than this calculation provides.

Q4: What if my due date changes?
A: If your healthcare provider adjusts your due date based on ultrasound measurements, use the most recent due date for the most accurate calculation.

Q5: Does this work for IVF pregnancies?
A: For IVF pregnancies, the conception date is known precisely, so this calculator is not necessary.