diff --git a/docs/2_Theoretical_background/Genetic-monitoring-indicator.md b/docs/2_Theoretical_background/Genetic-monitoring-indicator.md
index f12b089..56bdccc 100644
--- a/docs/2_Theoretical_background/Genetic-monitoring-indicator.md
+++ b/docs/2_Theoretical_background/Genetic-monitoring-indicator.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: Genetic monitoring indicator
-parent: Theoretical background
+parent: Background
 nav_order: 4
 ---
 
diff --git a/docs/2_Theoretical_background/Genetic_div_indicators.md b/docs/2_Theoretical_background/Genetic_div_indicators.md
index ed3ab80..a871737 100644
--- a/docs/2_Theoretical_background/Genetic_div_indicators.md
+++ b/docs/2_Theoretical_background/Genetic_div_indicators.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: Genetic diversity and indicators
-parent: Theoretical background
+parent: Background
 nav_order: 1
 ---
 
diff --git a/docs/2_Theoretical_background/Ne-500.md b/docs/2_Theoretical_background/Ne-500.md
index 2d21e4b..f82f8f5 100644
--- a/docs/2_Theoretical_background/Ne-500.md
+++ b/docs/2_Theoretical_background/Ne-500.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: Ne 500 indicator
-parent: Theoretical background
+parent: Background
 nav_order: 2
 ---
 
diff --git a/docs/2_Theoretical_background/PM-indicator.md b/docs/2_Theoretical_background/PM-indicator.md
index c4fa32c..2ff5459 100644
--- a/docs/2_Theoretical_background/PM-indicator.md
+++ b/docs/2_Theoretical_background/PM-indicator.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: Populations maintained indicator
-parent: Theoretical background
+parent: Background
 nav_order: 3
 ---
 
diff --git a/docs/2_Theoretical_background/What-is-a-population.md b/docs/2_Theoretical_background/What-is-a-population.md
index 41d764a..78e30f6 100644
--- a/docs/2_Theoretical_background/What-is-a-population.md
+++ b/docs/2_Theoretical_background/What-is-a-population.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: What is a population
-parent: Theoretical background
+parent: Background
 nav_order: 5
 ---