Calculating Pregnancy Age and EDD (Estimated Due Date): A Practical Guide for Expecting Mothers
Understanding how far along you are in your pregnancy and when your baby is likely to be born can help you plan and prepare with confidence. In this guide, we'll walk you through how to calculate your gestational age, estimate your due date (EDD), use tools like the Naegele’s Rule, pregnancy calendars, and apps — as well as track your trimester stages and prenatal checkup schedule.
PREGNANCYKEHAMILAN
Understanding Gestational Age and Estimated Due Date (EDD): A Simple Guide for Expecting Mothers
Knowing your pregnancy age and Estimated Due Date (EDD) is essential for monitoring your baby’s development and planning for labor. Yet many pregnant women still find themselves asking, “How many weeks along am I?” or “When is my actual due date?”
Let’s explore this practical and easy-to-understand guide! 😊
🗓️ 1. What Are Gestational Age and EDD?
Gestational Age is the number of weeks that have passed since the first day of your last menstrual period (LMP). It’s usually measured in weeks.
EDD (Estimated Due Date) is the expected date of delivery, based on your menstrual cycle.
💡 Note: The EDD is just an estimate — most women give birth between 38 and 42 weeks.
📌 2. How to Calculate Pregnancy Age Using LMP
💡 Quick method:
Count the number of weeks from the first day of your Last Menstrual Period (LMP) until today.
Example:
LMP: January 1
Today: March 27
→ You are about 12 weeks pregnant
📱 You can also use pregnancy apps or free online calculators — just input your LMP and they’ll do the rest!
📅 3. How to Calculate EDD Using Naegele’s Rule
This rule works best for women with regular 28-day cycles.
Naegele’s Formula:
LMP + 7 days – 3 months + 1 year
Example:
LMP: January 10, 2025
+7 days → January 17
–3 months → October 17
+1 year → EDD = October 17, 2025
🧠 For women with irregular cycles, the calculation is more complex and should be confirmed by an ultrasound.
📺 4. Determining Pregnancy Age by Ultrasound
If you’re unsure of your LMP or have irregular periods, an ultrasound can estimate the baby’s age.
First-trimester ultrasound is the most accurate
It will show the gestational age in weeks and your estimated due date
Your doctor or midwife will track development using this data.
🛑 5. Can Your EDD Change?
Yes, your due date can change — especially if:
You’re unsure of your LMP
The ultrasound shows a different growth rate than expected
Special conditions arise that require closer monitoring.
🎯 Conclusion
Knowing your gestational age and EDD helps you:
Plan regular checkups
Prepare for childbirth with confidence
Track your baby’s growth through each trimester
✨ Always consult your midwife or doctor to ensure accurate monitoring throughout your pregnancy.
🩺 EDD and Pregnancy Monitoring at Bidan Anggraeni Linda
We’re here to help calculate your EDD, check your baby’s growth, and support you all the way to a calm and joyful delivery.
📍 Bidan Praktik Mandiri Anggraeni Linda
Jl. Soekarno Hatta, Gg. H. Hasan 2 No.9, Bandung
📞 +62 856-5929-8380
✨ Friendly consultations, full pregnancy education, and routine checkups — all in one place for your peace of mind. 💕