1. What is Gestational Age?

Gestational age is the common term used during pregnancy to describe how far along the pregnancy is. It is measured in weeks from the first day of the woman's last menstrual period (LMP) to the current date.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

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

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

3. Importance of Gestational Age Calculation

Details: Accurate gestational age determination is crucial for proper prenatal care, timing of tests and screenings, monitoring fetal growth, and determining the due date.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What if I don't know my LMP date?
A: An ultrasound can estimate gestational age if LMP is unknown. Early ultrasounds (first trimester) are most accurate.

Q2: Is this calculation accurate for irregular cycles?
A: The calculation assumes a regular 28-day cycle. Women with irregular cycles may need ultrasound dating.

Q3: Why is gestational age different from fetal age?
A: Gestational age counts from LMP (about 2 weeks before conception), while fetal age counts from conception.

Q4: What if my cycle isn't 28 days?
A: For cycles longer than 28 days, add the difference to the calculation. For example, for a 35-day cycle, add 1 week.

Q5: When should I see a doctor?
A: Schedule your first prenatal visit as soon as you know you're pregnant, typically around 8 weeks gestational age.