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 8221acd..ae87a94 100644
--- a/1.4/source/RJW_Menstruation/RJW_Menstruation/HediffComps/MenstruationUtility.cs
+++ b/1.4/source/RJW_Menstruation/RJW_Menstruation/HediffComps/MenstruationUtility.cs
@@ -399,8 +399,8 @@ namespace RJW_Menstruation
             if (pawn.RaceHasOviPregnancy()) return false;
             if (ModsConfig.BiotechActive && pawn.genes != null)
             {
-                foreach (Gene gene in pawn.genes.GenesListForReading)
-                    if (VariousDefOf.EggLayerGenes.Contains(gene.def)) return false;
+                foreach (GeneDef geneDef in pawn.genes.GenesListForReading.Select(gene => gene.def))
+                    if (VariousDefOf.EggLayerGenes.Contains(geneDef)) return false;
             }
             
             return true;