Galen eCalcs - Calculator: Pregnancy Due Dates

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Revision as of 21:35, 9 December 2019 by David.Burkhead (talk | contribs)
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PDD 2019.png


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 Search/Filter Keywords

At the calculator level, eCalcs comes delivered with default keywords that can be leveraged in the "Search/Filter" field to enable Specialty or System driven calculator searching. The following calculator keywords are delivered by default for the Pregnancy Due Dates calculator:


  • Critical Care
  • Family Practice
  • Obstetrics


  • Reproductive

Calculator Configuration Options

Preference Name Valid Range Description
Publishing Checked / Unchecked When checked, the calculator will display for users on the front end.
When unchecked, the calculator WILL NOT display for users on the front end.
Orderable Item Override (BLANK) / G-PregDD “(BLANK)” indicates that the global configuration options for Orderable Item will be used.
“G-PregDD” indicates that the calculator specific value will be used and can display the specific calculator name in the chart output.

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