diff --git a/_data/codelists/susheel_gender_Lbc3RUsSRuRK5qQBPvdV89_DMD.csv b/_data/codelists/susheel_gender_Lbc3RUsSRuRK5qQBPvdV89_DMD.csv
new file mode 100644
index 00000000..436b6f19
--- /dev/null
+++ b/_data/codelists/susheel_gender_Lbc3RUsSRuRK5qQBPvdV89_DMD.csv
@@ -0,0 +1,5 @@
+System,Code,Description
+dm+d,1,Male
+dm+d,2,Female
+dm+d,9,Indeterminate (unable to be classified as either male or female)
+dm+d,X,Not Known (not recorded)
\ No newline at end of file
diff --git a/_data/codelists/susheel_gender_Lbc3RUsSRuRK5qQBPvdV89_GPRD.csv b/_data/codelists/susheel_gender_Lbc3RUsSRuRK5qQBPvdV89_GPRD.csv
new file mode 100644
index 00000000..40a0ac13
--- /dev/null
+++ b/_data/codelists/susheel_gender_Lbc3RUsSRuRK5qQBPvdV89_GPRD.csv
@@ -0,0 +1,3 @@
+System,Code,Description
+gprd,1,Male
+gprd,2,Female
\ No newline at end of file
diff --git a/_data/codelists/susheel_gender_Lbc3RUsSRuRK5qQBPvdV89_ISD.csv b/_data/codelists/susheel_gender_Lbc3RUsSRuRK5qQBPvdV89_ISD.csv
new file mode 100644
index 00000000..7cd24fe7
--- /dev/null
+++ b/_data/codelists/susheel_gender_Lbc3RUsSRuRK5qQBPvdV89_ISD.csv
@@ -0,0 +1,5 @@
+System,Code,Description
+isd,0,"Not Known (i.e. Indeterminate sex, includes 'Intersex')"
+isd,1,Male
+isd,2,Female
+isd,9,"Not Specificed (includes not stated by patient, or not recorded)"
\ No newline at end of file
diff --git a/_data/data_sources.yml b/_data/data_sources.yml
index 7645cee7..40880367 100644
--- a/_data/data_sources.yml
+++ b/_data/data_sources.yml
@@ -50,7 +50,12 @@ Office of National Statistics (ONS):
   name: Office for National Statistics (ONS)
   id: 487222b7-5c13-4a92-8b41-044796048720
   url: https://web.www.healthdatagateway.org/dataset/487222b7-5c13-4a92-8b41-044796048720
-
-
-
+National Neonatal Research Database:
+  name: National Neonatal Research Database
+  id: 67020745-9def-4c6e-b5ac-bb273bd0a20e
+  url: https://web.www.healthdatagateway.org/dataset/67020745-9def-4c6e-b5ac-bb273bd0a20e
+Maternity Services Data Set:
+  name: Maternity Services Data Set
+  id: 11d3cf0f-ae5d-42f4-a756-b98c3eff46bc
+  url: https://web.www.healthdatagateway.org/dataset/11d3cf0f-ae5d-42f4-a756-b98c3eff46bc
   
diff --git a/_layouts/phenotype.html b/_layouts/phenotype.html
index af0cc331..53fc3524 100644
--- a/_layouts/phenotype.html
+++ b/_layouts/phenotype.html
@@ -79,7 +79,15 @@ <h3 id="metadata">Metadata</h3>
                 {% elsif codelist contains 'UKBIOBANK' %}
                 <button type="button" class="btn btn-sm">
                     <a href="/codelists/{{codelist}}">UK Biobank</a>
-                </button>                    
+                </button>
+                {% elsif codelist contains 'GPRD' %}
+                <button type="button" class="btn btn-sm">
+                    <a href="/codelists/{{codelist}}">GPRD</a>
+                </button>
+                {% elsif codelist contains 'ISD' %}
+                <button type="button" class="btn btn-sm">
+                    <a href="/codelists/{{codelist}}">ISD</a>
+                </button>                       
 
             {% endif %}          
 
diff --git a/_phenotypes/susheel_gender_Lbc3RUsSRuRK5qQBPvdV89.md b/_phenotypes/susheel_gender_Lbc3RUsSRuRK5qQBPvdV89.md
new file mode 100644
index 00000000..13a5561d
--- /dev/null
+++ b/_phenotypes/susheel_gender_Lbc3RUsSRuRK5qQBPvdV89.md
@@ -0,0 +1,35 @@
+---
+layout: phenotype
+title: Gender
+phenotype_id: Lbc3RUsSRuRK5qQBPvdV89
+name: Gender
+type: Lifestyle Risk Factor
+group: Demographics
+data_sources:
+    - National Neonatal Research Database
+    - Maternity Services Data Set
+validation: 
+codelists:
+    - susheel_gender_Lbc3RUsSRuRK5qQBPvdV89_DMD.csv
+    - susheel_gender_Lbc3RUsSRuRK5qQBPvdV89_GPRD.csv
+    - susheel_gender_Lbc3RUsSRuRK5qQBPvdV89_ISD.csv
+clinical_terminologies: 
+    - NHS Data Model and Dictionary
+    - GPRD Local Classification
+    - NHS Scotland ISD Data Dictionary
+author: Susheel Varma
+status: DRAFT
+date: 2021-02-07
+modified_date: 2021-02-07
+version: Revision 1
+---
+
+### Primary Care
+
+{% include csv.html csvdata=site.data.codelists.susheel_gender_Lbc3RUsSRuRK5qQBPvdV89_GPRD %}
+
+### Secondary Care
+
+{% include csv.html csvdata=site.data.codelists.susheel_gender_Lbc3RUsSRuRK5qQBPvdV89_DMD %}
+
+{% include csv.html csvdata=site.data.codelists.susheel_gender_Lbc3RUsSRuRK5qQBPvdV89_ISD %}
\ No newline at end of file