1. What is Gestation Weeks Calculation?

Gestation weeks calculation determines how far along a pregnancy has progressed by measuring the time elapsed since the first day of the last menstrual period (LMP). This is the standard method for dating pregnancies in clinical practice.

2. How Does the Calculator Work?

The calculator uses a simple formula:

Where:

• Current Date — Today's date or any specified date
• LMP Date — First day of last menstrual period

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

3. Importance of Gestation Weeks

Details: Accurate gestation dating is crucial for proper prenatal care, timing of tests, monitoring fetal growth, and determining the due date (approximately 40 weeks from LMP).

4. Using the Calculator

Tips: Enter the first day of your last menstrual period and either today's date or another date you want to check. The calculator will show how many weeks pregnant you would be on that date.

5. Frequently Asked Questions (FAQ)

Q1: What if I don't know my LMP?
A: If LMP is unknown, an ultrasound measurement in early pregnancy (especially first trimester) can provide an estimated gestation age.

Q2: Why is LMP used instead of conception date?
A: LMP is more reliably known than conception date for most women, and it's the standard reference point used in obstetrics.

Q3: What if my cycle isn't 28 days?
A: This calculation assumes a 28-day cycle. Women with significantly longer or irregular cycles may need adjustment, which can be done with early ultrasound dating.

Q4: How accurate is this calculation?
A: For women with regular 28-day cycles, it's quite accurate. Variability increases with irregular cycles or if ovulation occurred at an unusual time.

Q5: When should I see a doctor about my pregnancy?
A: You should schedule your first prenatal visit once you have a positive pregnancy test, typically around 8 weeks gestation.