1. What is Pregnancy Weeks Calculation?

Pregnancy weeks calculation determines how far along a pregnancy is by measuring the time elapsed since the first day of the last menstrual period (LMP). This is the standard method used by healthcare providers to track pregnancy progress.

2. How Does the Calculator Work?

The calculator uses the following simple formula:

Where:

• LMP Date — First day of last menstrual period
• Current Date — Today's date or any date you want to check

Explanation: The calculation counts the number of days between two dates and converts them to weeks by dividing by 7.

3. Importance of Pregnancy Dating

Details: Accurate pregnancy dating is crucial for proper prenatal care, scheduling important tests, determining due date, and identifying potential growth abnormalities.

4. Using the Calculator

Tips: Enter the first day of your last menstrual period and the current date (defaults to today). The calculator will show how many weeks pregnant this corresponds to.

5. Frequently Asked Questions (FAQ)

Q1: What if I don't know my LMP date?
A: If LMP is unknown, an ultrasound in early pregnancy can estimate gestational age. This calculator requires LMP date.

Q2: Why is pregnancy counted from LMP rather than conception?
A: LMP is used because it's a clearly identifiable date, while conception date is often unknown. Pregnancy is typically 40 weeks from LMP.

Q3: What if my cycle isn't 28 days?
A: This calculation assumes a standard 28-day cycle. If your cycle varies significantly, consult your healthcare provider for adjusted dating.

Q4: How accurate is this calculation?
A: It provides a good estimate for women with regular cycles. Early ultrasound dating is more precise if there's uncertainty.

Q5: What's considered full term?
A: A pregnancy is considered full term between 39 weeks 0 days and 40 weeks 6 days.