diff --git a/docs/source/design/concepts/index.rst b/docs/source/design/concepts/index.rst
index 1d23deff..c2cb57c7 100644
--- a/docs/source/design/concepts/index.rst
+++ b/docs/source/design/concepts/index.rst
@@ -17,3 +17,4 @@ schema that is used to create the tables in the target API.
     :maxdepth: 2
 
     samples_and_specimens.rst
+    sample_relationship
diff --git a/docs/source/design/concepts/sample_relationship.rst b/docs/source/design/concepts/sample_relationship.rst
new file mode 100644
index 00000000..98fb2781
--- /dev/null
+++ b/docs/source/design/concepts/sample_relationship.rst
@@ -0,0 +1,9 @@
+.. _sample_relationship:
+
+========================
+Sample Relationship
+========================
+
+Samples can be related to one another in a one-to-many relationship.
+Specifically a sample can have one or more child samples. A child sample
+can be the parent of another sample.
\ No newline at end of file