1. What is the Flo Due Date Calculator?

The Flo Due Date Calculator estimates a woman's expected delivery date based on the first day of her last menstrual period (LMP) using the standard 280-day (40-week) pregnancy calculation method.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( LMP \) — First day of last menstrual period
• \( 280\ days \) — Standard length of pregnancy (40 weeks)

Explanation: This method assumes a regular 28-day menstrual cycle with ovulation occurring on day 14. The actual conception date is typically about two weeks after the LMP.

3. Importance of Due Date Calculation

Details: Knowing the estimated due date helps healthcare providers monitor fetal development, schedule important prenatal tests at the right times, and prepare for delivery. It also helps expectant parents plan for the baby's arrival.

4. Using the Calculator

Tips: Enter the first day of your last menstrual period in the format YYYY-MM-DD. For best accuracy, you should know your LMP date with certainty.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this due date calculation?
A: Only about 5% of women deliver on their exact due date. Most deliver within two weeks before or after the estimated date.

Q2: What if my cycle isn't 28 days?
A: This calculation works best for women with regular 28-day cycles. If your cycle is significantly longer or shorter, consult your healthcare provider for a more accurate estimation.

Q3: Can the due date change?
A: Yes, healthcare providers may adjust the due date after an ultrasound, especially if there's a significant difference between the LMP-based date and ultrasound measurements.

Q4: What's Naegele's rule?
A: This is the traditional method: Add 7 days to LMP, then subtract 3 months. Our calculator uses the simpler 280-day equivalent of this rule.

Q5: When should I see a doctor after calculating my due date?
A: Schedule your first prenatal visit as soon as you suspect you're pregnant, typically around 8 weeks after your LMP.