Gestational Age Formula:
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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.
The calculator uses the standard gestational age formula:
Where:
Explanation: The calculation counts the number of days between the LMP and current date, then converts to weeks and days.
Details: Knowing the gestational age helps healthcare providers monitor fetal development, schedule important tests, and determine the due date. It's crucial for proper prenatal care.
Tips: Enter the first day of your last menstrual period and the current date (or any date you want to check). The calculator will show how many weeks and days pregnant you are.
Q1: What if I don't know my LMP?
A: If you don't know your LMP, an ultrasound can estimate gestational age based on fetal measurements.
Q2: Is this calculation accurate?
A: This calculation assumes a regular 28-day cycle. Variations in cycle length may affect accuracy.
Q3: How does this relate to due date?
A: The estimated due date is typically 40 weeks from the LMP (280 days).
Q4: What if my cycles are irregular?
A: For irregular cycles, early ultrasound dating is more accurate than LMP-based calculation.
Q5: What's the difference between gestational age and fetal age?
A: Gestational age counts from LMP, while fetal age counts from conception (about 2 weeks less).