Galen eCalcs - Calculator: Pregnancy Due Dates

Description

Calculates pregnancy dates, forward from last period or backward from due date. This tool calculates three values based on a known date of either last menstrual period, date of conception, current gestational age, or due date.

Calculator Inputs

Input	Mapping Type	Description
Last Menstrual Period	Vitals / No Default Mappings	Date of patient’s last menstrual period
Date of Conception	Manual Input	Date of Conception
Current Gestational Age	Manual Input	Current Gestational Age
Due Date	Manual Input	Due Date

Calculator Outputs

Output	Mapping Type	Description
Estimated gestational age	Result	Estimated gestational age of the embryo or fetus
Estimated last menstrual period	Result	Backwards estimation of the last menstrual period
Estimated due Date	Result	Estimated due date of birth
Estimated date of conception	Result	Backwards estimation of the date of conception

References

http://www.mdcalc.com/pregnancy-due-dates-calculator/