{

"resourceType": "Observation",
"id": "date-lastmp",
"text": {
  "status": "generated",
  "div": "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p><b>Generated Narrative with Details</b></p><p><b>id</b>: date-lastmp</p><p><b>status</b>: final</p><p><b>category</b>: AOE <span>(Details : {http://hl7.org/fhir/observation-category code 'survey' = 'Survey', given as 'Survey'})</span></p><p><b>code</b>: Date last menstrual period <span>(Details : {LOINC code '8665-2' = 'Last menstrual period start date', given as 'Date last menstrual period'})</span></p><p><b>subject</b>: <a>Patient/pat2</a></p><p><b>effective</b>: Jan 24, 2016</p><p><b>value</b>: Dec 30, 2016</p></div>"
},
"status": "final",
"category": [
  {
    "coding": [
      {
        "system": "http://hl7.org/fhir/observation-category",
        "code": "survey",
        "display": "Survey"
      }
    ],
    "text": "AOE"
  }
],
"code": {
  "coding": [
    {
      "system": "http://loinc.org",
      "code": "8665-2",
      "display": "Date last menstrual period"
    }
  ],
  "text": "Date last menstrual period"
},
"subject": {
  "reference": "Patient/pat2"
},
"effectiveDateTime": "2016-01-24",
"valueDateTime": "2016-12-30"

}