1. What is the Due Date Calculator?

The pregnancy due date calculator estimates your expected delivery date based on your last menstrual period (LMP) and average cycle length, using the Flo app adjustment method for more personalized results.

2. How Does the Calculator Work?

The calculator uses the following calculation:

Where:

• LMP — First day of your last menstrual period
• 280 days — Standard length of pregnancy (40 weeks)
• Cycle Length — Your average menstrual cycle length in days

Explanation: The standard calculation adds 280 days (40 weeks) to LMP. The Flo adjustment accounts for cycle length differences from the standard 28-day cycle.

3. Importance of Due Date Calculation

Details: Knowing your estimated due date helps track pregnancy progress, schedule important prenatal tests, and prepare for delivery. Only about 5% of women deliver on their exact due date.

4. Using the Calculator

Tips: Enter the first day of your last menstrual period and your average cycle length. For irregular cycles, use your average over several months.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this due date calculation?
A: The calculation is 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 LMP?
A: If you don't know your LMP, an ultrasound measurement in early pregnancy can provide an estimated due date.

Q3: Why adjust for cycle length?
A: Women with longer cycles typically ovulate later in their cycle, which affects conception timing and due date.

Q4: What if my cycles are irregular?
A: For irregular cycles, use your average cycle length over the past 6 months. An early ultrasound may provide a more accurate due date.

Q5: Can the due date change?
A: Yes, healthcare providers may adjust your due date based on early ultrasound measurements, especially if they differ significantly from LMP-based calculations.