diff --git a/1.4/source/RJW_Menstruation/RJW_Menstruation/HediffComps/MenstruationUtility.cs b/1.4/source/RJW_Menstruation/RJW_Menstruation/HediffComps/MenstruationUtility.cs
index ae87a94..95901c6 100644
--- a/1.4/source/RJW_Menstruation/RJW_Menstruation/HediffComps/MenstruationUtility.cs
+++ b/1.4/source/RJW_Menstruation/RJW_Menstruation/HediffComps/MenstruationUtility.cs
@@ -397,11 +397,8 @@ namespace RJW_Menstruation
         {
             if (!Configurations.EnableAnimalCycle && pawn.IsAnimal()) return false;
             if (pawn.RaceHasOviPregnancy()) return false;
-            if (ModsConfig.BiotechActive && pawn.genes != null)
-            {
-                foreach (GeneDef geneDef in pawn.genes.GenesListForReading.Select(gene => gene.def))
-                    if (VariousDefOf.EggLayerGenes.Contains(geneDef)) return false;
-            }
+            if (ModsConfig.BiotechActive && pawn.genes != null &&
+                pawn.genes.GenesListForReading.Select(gene => gene.def).Intersect(VariousDefOf.EggLayerGenes).Any()) return false;
             
             return true;
         }