Newborn Youngest Twin Example

{
  "resourceType" : "Patient",
  "id" : "infant-twin-2",
  "extension" : [{
    "url" : "http://hl7.org/fhir/StructureDefinition/patient-mothersMaidenName",
    "valueString" : "Organa"
  }],
  "identifier" : [{
    "type" : {
      "coding" : [{
        "system" : "http://terminology.hl7.org/CodeSystem/v2-0203",
        "code" : "MR"
      }]
    },
    "system" : "http://coruscanthealth.org/main-hospital/patient-identifier",
    "value" : "MRN7465676978"
  },
  {
    "system" : "http://new-republic.gov/galactic-citizen-identifier",
    "value" : "7465676978"
  }],
  "name" : [{
    "use" : "official",
    "family" : "Solo",
    "given" : ["Jacen"]
  }],
  "gender" : "male",
  "birthDate" : "2017-05-15",
  "_birthDate" : {
    "extension" : [{
      "url" : "http://hl7.org/fhir/StructureDefinition/patient-birthTime",
      "valueDateTime" : "2017-05-15T17:11:30+01:00"
    }]
  },
  "multipleBirthInteger" : 2,
  "contact" : [{
    "relationship" : [{
      "coding" : [{
        "system" : "http://snomed.info/sct",
        "code" : "72705000",
        "display" : "Mother"
      },
      {
        "system" : "http://terminology.hl7.org/CodeSystem/v2-0131",
        "code" : "N"
      },
      {
        "system" : "http://terminology.hl7.org/CodeSystem/v3-RoleCode",
        "code" : "MTH"
      }]
    }],
    "name" : {
      "use" : "maiden",
      "family" : "Organa",
      "given" : ["Leia"]
    },
    "telecom" : [{
      "system" : "phone",
      "value" : "+31201234567",
      "use" : "mobile"
    }]
  }]
}