Pregnancy Due Date Calculator | Conception or Last Period

Pregnancy Due Date Calculator | Conception or Last Period

Pregnancy Calculator (EDD, Gestational Age, Trimester)

🤰 Pregnancy Due Date and Gestational Age Calculator

Welcome to our comprehensive Pregnancy Calculator. This tool uses the first day of your **Last Menstrual Period (LMP)** and your typical **Cycle Length** to estimate your **Expected Due Date (EDD)**, current **Gestational Age**, and the start of each **Trimester**. It primarily employs the standard **Naegele's Rule** (LMP + 280 days for a 28-day cycle) but adjusts for your specific cycle length. Knowing these dates helps you and your healthcare provider plan prenatal care, schedule important tests, and prepare for the arrival of your baby. You can also input a known Ovulation or Conception date for a potentially more accurate estimate.

🎉 Your Pregnancy Results

Estimated Due Date (EDD)
Gestational Age (Today)
Current Trimester
Weeks Remaining Until Due Date
Predicted Ovulation Date
Estimated Fertile Window

Progress Tracker: Weeks Completed

0%

Progress updates will appear here.


Trimester Milestones

Start of Second Trimester
Start of Third Trimester
Recommended Health Tip

📚 Learn More: Understanding Your Pregnancy Dates

[**PLACEHOLDER FOR THE ~2000-WORD SEO ARTICLE CONTENT.** Please ensure this section is filled with the comprehensive, informative content requested, using H2 and H3 headings for structure.]


❓ Frequently Asked Questions (FAQ)

How is the Estimated Due Date (EDD) calculated? +
The EDD is primarily calculated using **Naegele's Rule**. This involves taking the first day of your Last Menstrual Period (LMP), adding one year, subtracting three months, and adding seven days. Our calculator adjusts this formula based on your specific cycle length: if your cycle is longer than 28 days, the due date is extended; if it's shorter, it is brought forward.
How accurate is the Due Date from an LMP calculation? +
LMP calculations provide a good estimate but are not always exact. They rely on the assumption of a typical 28-day cycle and ovulation on day 14. Due dates are most accurate when confirmed by an early-stage ultrasound (before 12 weeks). Only about 4% of babies are born exactly on their estimated due date, with the majority arriving within a week on either side.
What is the difference between Gestational Age and Fetal Age? +
**Gestational Age** is the time elapsed since the first day of your last menstrual period (LMP), calculated over 40 weeks. **Fetal Age** (or conceptual age) is the time elapsed since conception, which is typically two weeks *after* the LMP, making it about two weeks shorter than the gestational age. Doctors almost always use Gestational Age for tracking development.
When do the trimesters officially begin and end? +
Pregnancy is commonly divided into three trimesters for clinical tracking, totaling 40 weeks. The divisions are generally:
  • **First Trimester:** Week 1 (LMP) through the end of Week 13.
  • **Second Trimester:** Week 14 through the end of Week 27.
  • **Third Trimester:** Week 28 until birth (typically Week 40).
Can I use the calculator if I don't know my LMP? +
If your cycles are irregular or you don't recall your LMP, you should use the optional **Ovulation Date** or **Conception Date** fields for a better estimate. However, the most reliable method in this scenario is an early pregnancy ultrasound, which can measure the embryo/fetus to determine the gestational age.

You may like these posts