⚕️ Health Notice: Results are for educational use only. Do not use this tool for self-diagnosis. Consult a healthcare professional for medical concerns.
What is Gestational Age Estimator?
Uses Naegele's Rule to estimate delivery date based on menstrual cycle.
How it Works
1. Recall LMP (Last Menstrual Period). 2. Adjust for Cycle Length. 3. Project Term.
Step-by-Step Guide
- 1 LMP
- First day.
- 2 Cycle
- Days.
- 3 Project
- Calc date.
- 4 Result
- EDC.
Example
Input: Jan 1, 28d
Result: Oct 8
FAQ
Ultrasound vs LMP?
Ultrasound in first trimester is most accurate.
Full term?
39 weeks to 40 weeks 6 days.
Implantation?
Occurs 6-10 days after ovulation.
Leap years?
Calculator adjusts for them.
Variability?
First pregnancies often go longer.
Conclusion
A 'due date' is a median; normal gestation ranges from 37 to 42 weeks.