# Genie Last Menstrual Period - Magentus Practice Management FHIR Implementation Guide v1.2.60

* [**Table of Contents**](toc.md)
* [**Artifacts Summary**](artifacts.md)
* **Genie Last Menstrual Period**

## Resource Profile: Genie Last Menstrual Period 

| | |
| :--- | :--- |
| *Official URL*:http://fhir.geniesolutions.io/StructureDefinition/gs-lastmenstrualperiod | *Version*:1.2.60 |
| Active as of 2026-04-05 | *Computable Name*:GSLastMenstrualPeriod |

 
This profile sets minimum expectations for an Observation resource to record, search, and fetch observations that represent the date of a patient’s last known menstrual period at a point in time with standard coding and value. It is based on the core FHIR [Observation](http://hl7.org/fhir/R4/observation.html) resource and identifies the **additional** mandatory core elements, extensions, vocabularies and value sets that **SHALL** be present in the Observation resource when conforming to this profile. It provides the floor for standards development for specific uses cases in an Australian context. 

**Usages:**

* Examples for this Profile: [Observation/12345](Observation-12345.md)

You can also check for [usages in the FHIR IG Statistics](https://packages2.fhir.org/xig/geniesolutions.fhir|current/StructureDefinition/gs-lastmenstrualperiod)

### Formal Views of Profile Content

 [Description of Profiles, Differentials, Snapshots and how the different presentations work](http://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#structure-definitions). 

 

Other representations of profile: [CSV](StructureDefinition-gs-lastmenstrualperiod.csv), [Excel](StructureDefinition-gs-lastmenstrualperiod.xlsx), [Schematron](StructureDefinition-gs-lastmenstrualperiod.sch) 



## Resource Content

```json
{
  "resourceType" : "StructureDefinition",
  "id" : "gs-lastmenstrualperiod",
  "url" : "http://fhir.geniesolutions.io/StructureDefinition/gs-lastmenstrualperiod",
  "version" : "1.2.60",
  "name" : "GSLastMenstrualPeriod",
  "title" : "Genie Last Menstrual Period",
  "status" : "active",
  "date" : "2026-04-05T21:47:41+00:00",
  "publisher" : "Magentus Practice Management",
  "contact" : [{
    "name" : "Magentus Practice Management",
    "telecom" : [{
      "system" : "url",
      "value" : "https://www.magentus.com/practice-management"
    },
    {
      "system" : "email",
      "value" : "andy.bond@magentus.com"
    }]
  },
  {
    "name" : "Magentus Practice Management",
    "telecom" : [{
      "system" : "url",
      "value" : "https://www.magentus.com/practice-management",
      "use" : "work"
    }]
  }],
  "description" : "This profile sets minimum expectations for an Observation resource to record, search, and fetch observations that represent the date of a patient’s last known menstrual period at a point in time with standard coding and value. It is based on the core FHIR [Observation](http://hl7.org/fhir/R4/observation.html) resource and identifies the *additional* mandatory core elements, extensions, vocabularies and value sets that **SHALL** be present in the Observation resource when conforming to this profile. It provides the floor for standards development for specific uses cases in an Australian context.",
  "jurisdiction" : [{
    "coding" : [{
      "system" : "urn:iso:std:iso:3166",
      "code" : "AU"
    }]
  }],
  "fhirVersion" : "4.0.1",
  "mapping" : [{
    "identity" : "workflow",
    "uri" : "http://hl7.org/fhir/workflow",
    "name" : "Workflow Pattern"
  },
  {
    "identity" : "sct-concept",
    "uri" : "http://snomed.info/conceptdomain",
    "name" : "SNOMED CT Concept Domain Binding"
  },
  {
    "identity" : "v2",
    "uri" : "http://hl7.org/v2",
    "name" : "HL7 v2 Mapping"
  },
  {
    "identity" : "rim",
    "uri" : "http://hl7.org/v3",
    "name" : "RIM Mapping"
  },
  {
    "identity" : "w5",
    "uri" : "http://hl7.org/fhir/fivews",
    "name" : "FiveWs Pattern Mapping"
  },
  {
    "identity" : "sct-attr",
    "uri" : "http://snomed.org/attributebinding",
    "name" : "SNOMED CT Attribute Binding"
  }],
  "kind" : "resource",
  "abstract" : false,
  "type" : "Observation",
  "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Observation",
  "derivation" : "constraint",
  "differential" : {
    "element" : [{
      "id" : "Observation",
      "path" : "Observation",
      "short" : "Date of last menstrual period",
      "definition" : "An observation of the date of the last known menstrual period at a point in time."
    },
    {
      "id" : "Observation.status",
      "path" : "Observation.status",
      "fixedCode" : "final",
      "mustSupport" : true
    },
    {
      "id" : "Observation.category",
      "path" : "Observation.category",
      "slicing" : {
        "discriminator" : [{
          "type" : "value",
          "path" : "$this"
        }],
        "rules" : "open"
      },
      "min" : 1,
      "mustSupport" : true
    },
    {
      "id" : "Observation.code",
      "path" : "Observation.code",
      "mustSupport" : true
    },
    {
      "id" : "Observation.code.coding",
      "path" : "Observation.code.coding",
      "slicing" : {
        "discriminator" : [{
          "type" : "value",
          "path" : "code"
        },
        {
          "type" : "value",
          "path" : "system"
        }],
        "rules" : "open"
      },
      "min" : 1
    },
    {
      "id" : "Observation.code.coding:loincLastMenstrualPeriod",
      "path" : "Observation.code.coding",
      "sliceName" : "loincLastMenstrualPeriod",
      "short" : "LOINC Last Menstrual Period",
      "min" : 0,
      "max" : "1"
    },
    {
      "id" : "Observation.code.coding:loincLastMenstrualPeriod.system",
      "path" : "Observation.code.coding.system",
      "min" : 1,
      "fixedUri" : "http://loinc.org"
    },
    {
      "id" : "Observation.code.coding:loincLastMenstrualPeriod.code",
      "path" : "Observation.code.coding.code",
      "min" : 1,
      "fixedCode" : "8665-2"
    },
    {
      "id" : "Observation.code.coding:snomedLastMenstrualPeriod",
      "path" : "Observation.code.coding",
      "sliceName" : "snomedLastMenstrualPeriod",
      "short" : "Snomed Last Menstrual Period",
      "min" : 1,
      "max" : "1"
    },
    {
      "id" : "Observation.code.coding:snomedLastMenstrualPeriod.system",
      "path" : "Observation.code.coding.system",
      "min" : 1,
      "fixedUri" : "http://snomed.info/sct"
    },
    {
      "id" : "Observation.code.coding:snomedLastMenstrualPeriod.code",
      "path" : "Observation.code.coding.code",
      "min" : 1,
      "fixedCode" : "21840007"
    },
    {
      "id" : "Observation.subject",
      "path" : "Observation.subject",
      "min" : 1,
      "type" : [{
        "code" : "Reference",
        "targetProfile" : ["http://fhir.geniesolutions.io/StructureDefinition/gs-patient"]
      }],
      "mustSupport" : true
    },
    {
      "id" : "Observation.encounter",
      "path" : "Observation.encounter",
      "type" : [{
        "code" : "Reference",
        "targetProfile" : ["http://fhir.geniesolutions.io/StructureDefinition/eorders-encounter"]
      }],
      "mustSupport" : true
    },
    {
      "id" : "Observation.effective[x]",
      "path" : "Observation.effective[x]",
      "short" : "Date, and optionally time, the observation was performed",
      "definition" : "Date, and optionally time, the observation was performed.",
      "min" : 1,
      "type" : [{
        "code" : "dateTime"
      }],
      "condition" : ["au-core-obs-01"],
      "mustSupport" : true
    },
    {
      "id" : "Observation.performer",
      "path" : "Observation.performer",
      "type" : [{
        "code" : "Reference",
        "targetProfile" : ["http://fhir.geniesolutions.io/StructureDefinition/gs-practitioner",
        "http://fhir.geniesolutions.io/StructureDefinition/gs-practitionerrole",
        "http://fhir.geniesolutions.io/StructureDefinition/gs-organization",
        "http://fhir.geniesolutions.io/StructureDefinition/gs-patient"]
      }],
      "mustSupport" : true
    },
    {
      "id" : "Observation.value[x]",
      "path" : "Observation.value[x]",
      "type" : [{
        "code" : "dateTime"
      }],
      "mustSupport" : true
    },
    {
      "id" : "Observation.dataAbsentReason",
      "path" : "Observation.dataAbsentReason",
      "mustSupport" : true
    }]
  }
}

```
