{
  "resourceType": "ValueSet",
  "url": "https://example.nhs.uk/fhir/ValueSet/birthsex-mf-only",
  "version": "1.0.0",
  "name": "BirthSexMFOnly",
  "status": "active",
  "publisher": "NHS England",
  "description": "Restricted birth sex ValueSet allowing only Male and Female",
  "compose": {
    "include": [
      {
        "system": "http://terminology.hl7.org/CodeSystem/v3-AdministrativeGender",
        "concept": [
          {
            "code": "M",
            "display": "Male"
          },
          {
            "code": "F",
            "display": "Female"
          }
        ]
      }
    ]
  }
}