diff --git a/1.5/source/RJW_Menstruation/RJW_Menstruation/PregnancyCommon.cs b/1.5/source/RJW_Menstruation/RJW_Menstruation/PregnancyCommon.cs
index 6221a81..893a9cc 100644
--- a/1.5/source/RJW_Menstruation/RJW_Menstruation/PregnancyCommon.cs
+++ b/1.5/source/RJW_Menstruation/RJW_Menstruation/PregnancyCommon.cs
@@ -217,7 +217,7 @@ namespace RJW_Menstruation
 
             if (info != null)
             {
-                res = info.GetHybridWith(opposite.def.defName) ?? null;
+                res = info.GetHybridWith(opposite.def.defName);
             }
             if (res != null) return res;
 
@@ -226,14 +226,14 @@ namespace RJW_Menstruation
             dna = first.def.GetModExtension<PawnDNAModExtension>();
             if (dna != null)
             {
-                res = dna.GetHybridWith(second.def.defName) ?? null;
+                res = dna.GetHybridWith(second.def.defName);
             }
             else
             {
                 dna = second.def.GetModExtension<PawnDNAModExtension>();
                 if (dna != null)
                 {
-                    res = dna.GetHybridWith(first.def.defName) ?? null;
+                    res = dna.GetHybridWith(first.def.defName);
                 }
             }
             return res;
diff --git a/1.5/source/RJW_Menstruation/RJW_Menstruation/Things.cs b/1.5/source/RJW_Menstruation/RJW_Menstruation/Things.cs
index 8b110d7..d266480 100644
--- a/1.5/source/RJW_Menstruation/RJW_Menstruation/Things.cs
+++ b/1.5/source/RJW_Menstruation/RJW_Menstruation/Things.cs
@@ -25,7 +25,7 @@ namespace RJW_Menstruation
 
         public PawnKindDef GetHybridWith(string race)
         {
-            return GetHybridExtension(race)?.ChooseOne() ?? null;
+            return GetHybridExtension(race)?.ChooseOne();
         }
     }
 
@@ -128,7 +128,7 @@ namespace RJW_Menstruation
 
         public PawnKindDef GetHybridWith(string race)
         {
-            return GetHybridExtension(race)?.ChooseOne() ?? null;
+            return GetHybridExtension(race)?.ChooseOne();
         }
 
         public void ExposeData()