diff --git a/1.3/Assemblies/RJW_Menstruation.dll b/1.3/Assemblies/RJW_Menstruation.dll
index 886a1b1..a0bf21e 100644
Binary files a/1.3/Assemblies/RJW_Menstruation.dll and b/1.3/Assemblies/RJW_Menstruation.dll differ
diff --git a/1.3/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs b/1.3/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs
index 26c2898..1fb0099 100644
--- a/1.3/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs
+++ b/1.3/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs
@@ -1159,6 +1159,11 @@ namespace RJW_Menstruation
                 foreach (Egg egg in eggs)
                 {
                     if (!egg.fertilized || egg.fertstage < 168) continue;
+                    else if (egg.fertilizer is null)
+                    {
+                        deadeggs.Add(egg);
+                        continue;
+                    }
                     else if (Rand.Range(0.0f, 1.0f) <= Configurations.ImplantationChance * ImplantFactor * InterspeciesImplantFactor(egg.fertilizer))
                     {
                         Hediff_BasePregnancy pregnancy = parent.pawn.GetRJWPregnancy();
diff --git a/changelogs.txt b/changelogs.txt
index a9bac38..c0abcdf 100644
--- a/changelogs.txt
+++ b/changelogs.txt
@@ -1,6 +1,6 @@
 Version 1.0.6.6
- - The menstruation cycle used to start ticking exactly one game hour after loading the save. Now the hour timing is consistent across a save/load.
- - Every womb will tick at a different (but consistent) time after the hour per pawn.
+ - The womb tick timing is now more consistent across a save and load, and also spread out across pawns.
+ - Fix error when an egg fertilized by a nonexistent/garbage collected pawn (e.g. in an NPC's womb) tries to implant.
 
 Version 1.0.6.5
  - Handle climacteric induced ovulators a bit better.