1. What is the Pregnancy Test Calculator?

The Pregnancy Test Calculator estimates the optimal date to take a pregnancy test based on your last menstrual period (LMP) and calculates how many weeks pregnant you currently are.

2. How Does the Calculator Work?

The calculator uses the following calculation:

Where:

• \( LMP\ Date \) — First day of your last menstrual period
• \( 28\ days \) — Typical menstrual cycle length

Explanation: Pregnancy tests typically become accurate about 14 days after conception, which usually occurs around day 14 of a 28-day cycle.

3. Importance of Test Timing

Details: Testing too early can lead to false negatives. This calculator helps determine the earliest reliable date to test while accounting for normal cycle variations.

4. Using the Calculator

Tips: Enter the first day of your last menstrual period. The calculator will show when to test and your current pregnancy duration in weeks.

5. Frequently Asked Questions (FAQ)

Q1: What if my cycle isn't 28 days?
A: Adjust the test date accordingly (e.g., for a 35-day cycle, add 7 days to the recommended test date).

Q2: How accurate are home pregnancy tests?
A: Most are 99% accurate when used on or after the day of your expected period.

Q3: Can I test earlier than the recommended date?
A: Early detection tests may work 4-5 days before your expected period, but accuracy improves closer to your period date.

Q4: What time of day should I test?
A: First morning urine typically has the highest concentration of hCG hormone.

Q5: What should I do after a positive test?
A: Schedule an appointment with your healthcare provider to confirm the pregnancy and begin prenatal care.