1. What Is Pregnancy Week Calculator?

The Pregnancy Week Calculator determines the date range for each week of pregnancy based on the last menstrual period (LMP). It helps track fetal development and important milestones throughout the pregnancy journey.

2. How Does The Calculator Work?

The calculator uses the pregnancy dating formula:

Where:

• \( LMP \) — Last Menstrual Period (start date)
• \( Week \) — Pregnancy week number (1-40)
• \( 7 \) — Days per week multiplier

Explanation: The calculation starts from the first day of the last menstrual period and calculates the date range for each specific week of pregnancy.

3. Importance Of Pregnancy Dating

Details: Accurate pregnancy dating is essential for monitoring fetal growth, scheduling prenatal tests, determining due date, and identifying any potential developmental issues.

4. Using The Calculator

Tips: Enter the first day of your last menstrual period and select the pregnancy week you want to calculate. The calculator will provide the exact date range for that specific week.

5. Frequently Asked Questions (FAQ)

Q1: Why is LMP used instead of conception date?
A: LMP is more reliably remembered and provides a standardized starting point for pregnancy dating, as conception date is often uncertain.

Q2: How accurate is this calculation method?
A: This method provides standard obstetric dating, but ultrasound measurements in early pregnancy may provide more accurate dating.

Q3: What if I don't know my exact LMP?
A: Use your best estimate. Early ultrasound dating can help confirm or adjust the estimated due date.

Q4: How many weeks is a full-term pregnancy?
A: A full-term pregnancy is 39-40 weeks. Delivery between 37-38 weeks is considered early term, and 41+ weeks is post-term.

Q5: Can this calculator predict my due date?
A: Yes, your estimated due date is 40 weeks from your LMP (280 days).