diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c4c8e1..df36886 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -72,6 +72,8 @@ but they are meant mostly to have infectors immune against their own diseases.
 - Disease Gene: Vulnerability. Pawn is likelier to be raped 
 - Disease Gene: Infectious Hypersexuality
 - Disease Gene: Infectious Homosexuality & Bisexuality
+- Disease Gene: Infectious lower fertility
+- Disease Gene: Infectious higher sex need
 - Disease Gene: Fluctual Sexual Need. (Configurable) Chance to reset sex-need to near-zero and gain a bit of rest-need.
 - Disease Gene: Size Blinded. Pawns have a higher chance for hooking up with pawns with a big cock, lower chance for small cocks.
 - Infector Gene: Genetic Stretcher. Pawns can infect other pawns with *Size Blinded*
diff --git a/Common/Defs/GeneDefs/GeneDefs_Diseases.xml b/Common/Defs/GeneDefs/GeneDefs_Diseases.xml
index 2570b65..b9c1a45 100644
--- a/Common/Defs/GeneDefs/GeneDefs_Diseases.xml
+++ b/Common/Defs/GeneDefs/GeneDefs_Diseases.xml
@@ -85,6 +85,69 @@
         </modExtensions>
     </GeneDef>
 
+    <GeneDef ParentName="RJWGeneDisease">
+        <defName>rjw_genes_infectious_low_fertility</defName>
+        <label>infectious low fertility vulnerability</label>
+        <description>Carriers of this genetic disease have lower fertility.</description>
+        <biostatCpx>1</biostatCpx>
+        <biostatMet>1</biostatMet>
+        <marketValueFactor>0.9</marketValueFactor>
+        <iconPath>UI/Icons/ColonistBar/Idle</iconPath>
+        <displayOrderInCategory>5</displayOrderInCategory>
+
+        <statOffsets>
+            <Fertility>-0.15</Fertility>
+        </statOffsets>
+
+        <modExtensions>
+            <li Class="RJW_Genes.GeneticDiseaseExtension">
+                <infectionChance>0.05</infectionChance>
+            </li>
+        </modExtensions>
+    </GeneDef>
+
+    <GeneDef ParentName="RJWGeneDisease">
+        <defName>rjw_genes_infectious_increased_sex_need</defName>
+        <label>infectious increased sexneed</label>
+        <description>Carriers of this genetic disease need more sex.</description>
+        <biostatCpx>0</biostatCpx>
+        <biostatMet>1</biostatMet>
+        <marketValueFactor>0.9</marketValueFactor>
+        <iconPath>UI/Icons/ColonistBar/Idle</iconPath>
+        <displayOrderInCategory>5</displayOrderInCategory>
+
+        <statOffsets>
+            <SexFrequency>0.15</SexFrequency>
+        </statOffsets>
+
+        <modExtensions>
+            <li Class="RJW_Genes.GeneticDiseaseExtension">
+                <infectionChance>0.08</infectionChance>
+            </li>
+        </modExtensions>
+    </GeneDef>
+
+    <GeneDef ParentName="RJWGeneDisease">
+        <defName>rjw_genes_infectious_major_increased_sex_need</defName>
+        <label>major infectious increased sexneed</label>
+        <description>Carriers of this genetic disease need a lot more sex.</description>
+        <biostatCpx>1</biostatCpx>
+        <biostatMet>2</biostatMet>
+        <marketValueFactor>0.85</marketValueFactor>
+        <iconPath>UI/Icons/ColonistBar/Idle</iconPath>
+        <displayOrderInCategory>5</displayOrderInCategory>
+
+        <statOffsets>
+            <SexFrequency>1.0</SexFrequency>
+        </statOffsets>
+
+        <modExtensions>
+            <li Class="RJW_Genes.GeneticDiseaseExtension">
+                <infectionChance>0.03</infectionChance>
+            </li>
+        </modExtensions>
+    </GeneDef>
+
     <GeneDef ParentName="RJWGeneDisease">
         <defName>rjw_genes_infectious_hypersexuality</defName>
         <label>infectious hypersexuality</label>