When's the Baby Due?
The standard math your provider starts with, minus the account signup. Everything happens on your screen; nothing is stored or sent anywhere.
Every fact checked against the linked sources · July 2026
The names behind the initials — who we cite, and why they count
- MedlinePlus
- The plain-language medical encyclopedia run by the National Institutes of Health, the U.S. government's medical-research agency.
Work it out
This is the classic first-day-of-last-period math (280 days, adjusted for your cycle). It's a starting point: a first-trimester dating ultrasound sets the official due date your care team will use, and babies famously keep their own schedules anyway. MedlinePlus