1. What Is The Pregnancy Calculator?

The Pregnancy Calculator estimates your due date based on the first day of your last menstrual period (LMP) using the standard calculation of LMP + 280 days, as recommended by the American Pregnancy Association.

2. How Does The Calculator Work?

The calculator uses the standard pregnancy due date formula:

Where:

• \( EDD \) — Estimated Due Date
• \( LMP \) — First day of Last Menstrual Period
• \( 280 \text{ days} \) — Standard pregnancy duration (40 weeks)

Explanation: This calculation assumes a regular 28-day menstrual cycle and that conception occurred approximately 14 days after the LMP.

3. Importance Of Due Date Calculation

Details: Accurate due date estimation is crucial for proper prenatal care, monitoring fetal development, scheduling important tests, and preparing for delivery.

4. Using The Calculator

Tips: Enter the first day of your last menstrual period in the date field. The calculator will provide your estimated due date and current gestation period.

5. Frequently Asked Questions (FAQ)

Q1: How Accurate Is This Calculation?
A: This method is accurate for women with regular 28-day cycles. Ultrasound dating may provide more precise estimates, especially if cycles are irregular.

Q2: What If My Cycle Is Not 28 Days?
A: For cycles longer or shorter than 28 days, adjustments may be needed. Consult your healthcare provider for personalized calculation.

Q3: When Should I Confirm With Ultrasound?
A: Early ultrasound (8-12 weeks) can provide the most accurate dating. First-trimester ultrasound is considered the gold standard for pregnancy dating.

Q4: Can The Due Date Change?
A: Yes, healthcare providers may adjust the due date based on ultrasound measurements, especially if there's significant discrepancy from LMP-based calculation.

Q5: What Percentage Of Babies Are Born On Their Due Date?
A: Only about 5% of babies are born exactly on their due date. Most births occur within two weeks before or after the estimated due date.