description: This profile represents the date of the last menstrual period of the patient. The first day of last menstrual period should be captured. The effectiveTime captures the observation date.
package_name: hl7.fhir.us.vr
derivation: constraint
name: ObservationLastMenstrualPeriod
type: Observation
elements:
  code:
    short: Last menstrual period start date
    pattern:
      type: CodeableConcept
      value:
        coding:
        - {code: 8665-2, system: 'http://loinc.org'}
    index: 0
  subject:
    type: Reference
    refers: ['http://hl7.org/fhir/StructureDefinition/Patient']
    index: 1
  effective:
    short: Observation date
    mustSupport: false
    choices: [effectiveDateTime]
    index: 3
  effectiveDateTime: {type: dateTime, short: Observation date, mustSupport: false, choiceOf: effective, index: 4}
  value:
    short: Start of last menstrual period
    choices: [valueDateTime]
    index: 6
  valueDateTime: {type: dateTime, short: Start of last menstrual period, choiceOf: value, index: 7}
package_version: common-library-0.1.0
class: profile
kind: resource
url: http://hl7.org/fhir/us/vr-common-library/StructureDefinition/Observation-last-menstrual-period
base: http://hl7.org/fhir/StructureDefinition/Observation
version: 0.1.0
required: [subject]