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 standard formula:

Where:

• Current Date — The date of calculation
• LMP — First day of last menstrual period
• 7 — Number of days in a week

Explanation: This calculation provides the most accurate estimate when the menstrual cycle is regular (28-day cycle).

3. Importance of Gestational Age Calculation

Details: Accurate gestational age determination is crucial for proper prenatal care, timing of tests, 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. The calculator will determine how many weeks pregnant you are.

5. Frequently Asked Questions (FAQ)

Q1: What if my cycles aren't regular?
A: This calculation works best for women with regular 28-day cycles. If your cycles are irregular, an ultrasound may provide a more accurate estimate.

Q2: How accurate is this calculation?
A: When LMP is known and cycles are regular, this method is accurate to within ±3-5 days in the first trimester.

Q3: What's the difference between gestational age and fetal age?
A: Gestational age is about 2 weeks more than fetal age, as it counts from LMP rather than conception.

Q4: When should I see a doctor?
A: Schedule your first prenatal visit when you get a positive pregnancy test, typically around 8 weeks gestational age.

Q5: Can this be used after the first trimester?
A: While it can be used throughout pregnancy, ultrasound measurements become more accurate for dating after the first trimester.