1. What is the Pregnancy Calculator?

The Pregnancy Calculator estimates your due date based on the conception date. A typical pregnancy lasts about 266 days (38 weeks) from conception to delivery.

2. How Does the Calculator Work?

The calculator uses the standard formula:

Where:

• 266 days — Average length of pregnancy from conception
• Conception Date — Typically the date of ovulation/fertilization

Note: If calculating from last menstrual period (LMP), add 14 days to account for the typical time between LMP and conception.

3. Importance of Due Date Calculation

Details: Knowing your estimated due date helps with prenatal care planning, monitoring fetal development, and preparing for delivery. Only about 5% of women deliver on their exact due date.

4. Using the Calculator

Tips: Enter the date you believe conception occurred. If you know your ovulation date, that's typically the conception date. The calculator will show your estimated due date and current pregnancy progress.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is the due date calculation?
A: The calculation provides an estimate. Only about 5% of women deliver on their exact due date, with most delivering within 2 weeks before or after.

Q2: What if I don't know my conception date?
A: If you know your last menstrual period (LMP), add 14 days to estimate conception date. Ultrasound measurements in early pregnancy can provide more accurate dating.

Q3: Why 266 days?
A: This is the average time from conception to birth. The standard "40 weeks" of pregnancy counts from the last menstrual period (adding 14 days before conception).

Q4: Can the due date change?
A: Yes, early ultrasound measurements may lead your healthcare provider to adjust your due date if fetal measurements suggest a different conception date.

Q5: What factors can affect pregnancy length?
A: First pregnancies often last longer, maternal age, BMI, and genetic factors can influence pregnancy duration.