1. What is Gestational Age?

Gestational age is a measure of the age of a pregnancy from the first day of the last menstrual period (LMP). It is typically expressed in weeks and days and is used to track pregnancy progress and fetal development.

2. How Does the Calculator Work?

The calculator uses the standard gestational age formula:

Where:

• Current Date — Today's date or any date you want to calculate for
• LMP — First day of the last menstrual period
• 7 — Number of days in a week

Explanation: The calculation counts the number of days between the LMP and current date, then converts to weeks by dividing by 7.

3. Importance of Gestational Age Calculation

Details: Accurate gestational age determination is crucial for prenatal care, scheduling tests, monitoring fetal growth, and determining the due date (estimated date of delivery).

4. Using the Calculator

Tips: Enter the first day of your last menstrual period and the current date (or any date you want to check). The calculator will display the gestational age in weeks and days.

5. Frequently Asked Questions (FAQ)

Q1: What if I don't know my LMP?
A: If you don't know your LMP, an ultrasound measurement in early pregnancy can estimate gestational age based on fetal size.

Q2: How accurate is this calculation?
A: This calculation assumes a regular 28-day menstrual cycle with ovulation on day 14. Variations in cycle length may affect accuracy.

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

Q4: When should I see a doctor for pregnancy confirmation?
A: It's recommended to schedule your first prenatal visit when you're about 6-8 weeks pregnant (4-6 weeks after LMP).

Q5: How is this used to determine my due date?
A: The estimated due date is typically calculated as LMP + 280 days (40 weeks), known as Naegele's rule.