http://hl7.org/fhir/StructureDefinition/family-member-history-genetics-parent|5.2.0

Identifies a parent of the relative.

Name	Card	Type	Description & Constraints
Extension	0..*		Mother(s) & Father(s) - genetic & other
extension *	1..1	Extension	mother \| father \| adoptive mother \| etc.
extension	?..0
url	?..?	uri
value[x] *	1..?		ParentRelationshipType (required)
valueCodeableConcept *	1..?	CodeableConcept	ParentRelationshipType (required)
extension *	1..1	Extension	Link to parent relative(s)
extension	?..0
url	?..?	uri
value[x] *	1..?
valueReference *	1..?	Reference
url	?..?
value[x]	0..0