1. What is the Pregnancy Calculator?

The Pregnancy Calculator estimates conception date and current pregnancy progress based on the due date. It uses the standard calculation that pregnancy typically lasts 266 days from conception to delivery.

2. How Does the Calculator Work?

The calculator uses the following calculation:

Where:

• 266 days — Standard length of pregnancy from conception to delivery
• Due Date — Estimated date of delivery (EDD)

Explanation: The calculation assumes a standard 38-week (266-day) pregnancy from conception to birth, which is equivalent to 40 weeks from the first day of the last menstrual period (LMP).

3. Importance of Pregnancy Dating

Details: Accurate pregnancy dating is crucial for proper prenatal care, timing of tests, and monitoring fetal development. It helps healthcare providers determine if the baby is growing appropriately.

4. Using the Calculator

Tips: Enter your estimated due date (from your healthcare provider or ultrasound) to calculate your conception date and current pregnancy progress. The calculator will also show which trimester you're currently in.

5. Frequently Asked Questions (FAQ)

Q1: Why 266 days instead of 280 days?
A: 280 days (40 weeks) is counted from the first day of the last menstrual period (LMP), while 266 days (38 weeks) is from conception. This calculator works from conception.

Q2: How accurate is this calculation?
A: It provides an estimate. Actual pregnancy length can vary by ±2 weeks. Ultrasound dating in first trimester is more accurate.

Q3: What if I know my conception date?
A: If you know your exact conception date, simply add 266 days to calculate your estimated due date.

Q4: Does this work for IVF pregnancies?
A: For IVF, use the embryo transfer date plus 266 days (minus embryo age at transfer). Consult your fertility specialist.

Q5: What affects pregnancy length?
A: Factors include maternal age, parity, genetics, and medical conditions. First pregnancies often last slightly longer.