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.
Original guidance checked July 2026 · See the linked sources for updates
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. source
About the sources on this page
- MedlinePlus
- The plain-language medical encyclopedia run by the National Institutes of Health, the U.S. government's medical-research agency.
The Parent's Lounge ✦ part of the Little Story Magic family
Written by J. Ladis and Haley Dell, who are parents, not doctors. This is general education for healthy, full-term babies, not medical advice. Your pediatrician and OB know your family. When this page and your doctor differ, your doctor wins. Premature babies and babies with health conditions often have different rules.
Facts checked against the linked sources, July 2026.
Written by J. Ladis and Haley Dell, who are parents, not doctors. This is general education for healthy, full-term babies, not medical advice. Your pediatrician and OB know your family. When this page and your doctor differ, your doctor wins. Premature babies and babies with health conditions often have different rules.
Facts checked against the linked sources, July 2026.
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