diff --git a/json_schema/type/biomaterial/donor_organism.json b/json_schema/type/biomaterial/donor_organism.json
index 6bab6b74..72410d71 100644
--- a/json_schema/type/biomaterial/donor_organism.json
+++ b/json_schema/type/biomaterial/donor_organism.json
@@ -75,6 +75,16 @@
             "user_friendly": "Biological sex",
             "example": "Should be one of: male, female, mixed, or unknown."
         },
+
+
+	"gender_identity": {
+            "description": "The donor's personal sense of their own gender at the time of the experiment.",
+            "type": "object",
+            "$ref": "module/ontology/gender_identity.json",
+            "user_friendly": "Gender Identity",
+            "required": false
+        },
+    
         "is_living": {
             "description": "Whether organism was alive at time of biomaterial collection.",
             "type": "string",
diff --git a/json_schema/type/biomaterial/gender_identity.json b/json_schema/type/biomaterial/gender_identity.json
new file mode 100644
index 00000000..f9b22c06
--- /dev/null
+++ b/json_schema/type/biomaterial/gender_identity.json
@@ -0,0 +1,9 @@
+{
+    "gender_identity": {
+        "description": "The donor's personal sense of their own gender at the time of the experiment.",
+        "type": "object",
+        "$ref": "module/ontology/gender_identity.json",
+        "user_friendly": "Gender Identity",
+        "required": false
+   },
+}