diff --git a/1.4/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs b/1.4/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs
index 2d4fdae..4020e36 100644
--- a/1.4/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs
+++ b/1.4/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs
@@ -1364,7 +1364,7 @@ namespace RJW_Menstruation
         {
             if (eggs.NullOrEmpty()) return false;
 
-            List<Egg> deadeggs = new List<Egg>();
+            HashSet<Egg> deadeggs = new HashSet<Egg>();
             bool pregnant = false;
             foreach (Egg egg in eggs)
             {
@@ -1474,12 +1474,7 @@ namespace RJW_Menstruation
                 return true;
             }
             else
-            {
-                foreach (Egg egg in deadeggs)
-                {
-                    eggs.Remove(egg);
-                }
-            }
+                eggs.RemoveAll(egg => deadeggs.Contains(egg));
             return pregnant;
         }
 
@@ -1549,7 +1544,7 @@ namespace RJW_Menstruation
 
         protected void EggDecay()
         {
-            List<Egg> deadeggs = new List<Egg>();
+            HashSet<Egg> deadeggs = new HashSet<Egg>();
             foreach (Egg egg in eggs)
             {
                 egg.position += Configurations.CycleAcceleration;
@@ -1560,10 +1555,7 @@ namespace RJW_Menstruation
                     if (egg.lifespanhrs < 0) deadeggs.Add(egg);
                 }
             }
-            foreach (Egg egg in deadeggs)
-            {
-                eggs.Remove(egg);
-            }
+            eggs.RemoveAll(egg => deadeggs.Contains(egg));
         }
 
         protected void AddCrampPain()