How It Works
Estimated due date=LMP+280 days+(cycle length−28). Gestational age is measured from the cycle-adjusted menstrual origin, not fertilization.
Scope and Limitations
- An approximate calendar estimate for a regular cycle. Ultrasound and clinical history can change dating; it does not confirm pregnancy or predict the birth date.
Reference Sources
FAQs
How does this calculator work?
Estimated due date=LMP+280 days+(cycle length−28). Gestational age is measured from the cycle-adjusted menstrual origin, not fertilization.
What assumptions should I check?
An approximate calendar estimate for a regular cycle. Ultrasound and clinical history can change dating; it does not confirm pregnancy or predict the birth date.