diff --git a/1.4/Assemblies/RJW_Menstruation.dll b/1.4/Assemblies/RJW_Menstruation.dll
index 26ec0a6..8897ef0 100644
Binary files a/1.4/Assemblies/RJW_Menstruation.dll and b/1.4/Assemblies/RJW_Menstruation.dll differ
diff --git a/1.4/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_PregeneratedBabies.cs b/1.4/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_PregeneratedBabies.cs
index 0a919c4..4ce241f 100644
--- a/1.4/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_PregeneratedBabies.cs
+++ b/1.4/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_PregeneratedBabies.cs
@@ -202,7 +202,7 @@ namespace RJW_Menstruation
                 if (comp?.HasBaby ?? false)
                 {
                     OutcomeChance thisOutcome = outcome;
-                    Precept_Ritual precept_Ritual = (Precept_Ritual)comp.Pawn.Ideo.GetPrecept(PreceptDefOf.ChildBirth);
+                    Precept_Ritual precept_Ritual = (Precept_Ritual)comp.Pawn.Ideo.GetPrecept(RimWorld.PreceptDefOf.ChildBirth);
                     float birthQuality = PregnancyUtility.GetBirthQualityFor(mother);
                     do
                     {
diff --git a/1.4/source/RJW_Menstruation/RJW_Menstruation/RJW_Menstruation.csproj b/1.4/source/RJW_Menstruation/RJW_Menstruation/RJW_Menstruation.csproj
index 33cf9ec..2577bb6 100644
--- a/1.4/source/RJW_Menstruation/RJW_Menstruation/RJW_Menstruation.csproj
+++ b/1.4/source/RJW_Menstruation/RJW_Menstruation/RJW_Menstruation.csproj
@@ -109,10 +109,6 @@
       <HintPath>..\..\..\..\..\..\..\..\workshop\content\294100\2830943477\1.4\Assemblies\AnimalGenetics.dll</HintPath>
       <Private>False</Private>
     </Reference>
-    <Reference Include="Assembly-CSharp">
-      <HintPath>..\..\..\..\..\..\RimWorldWin64_Data\Managed\Assembly-CSharp.dll</HintPath>
-      <Private>False</Private>
-    </Reference>
     <Reference Include="RJW">
       <HintPath>..\..\..\..\..\rjw\1.4\Assemblies\RJW.dll</HintPath>
       <Private>False</Private>
@@ -173,6 +169,9 @@
     </BootstrapperPackage>
   </ItemGroup>
   <ItemGroup>
+    <PackageReference Include="Krafs.Rimworld.Ref">
+      <Version>1.4.3901</Version>
+    </PackageReference>
     <PackageReference Include="Lib.Harmony">
       <Version>2.2.2</Version>
       <ExcludeAssets>runtime</ExcludeAssets>
diff --git a/1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs b/1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs
index 437478c..fbb0115 100644
--- a/1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs
+++ b/1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs
@@ -716,7 +716,6 @@ namespace RJW_Menstruation
 
                 BeforeSimulator();
 
-                if (ShouldBeInfertile()) GoNextStage(Stage.Infertile);
                 switch (curStage)
                 {
                     case Stage.Follicular:
@@ -749,6 +748,7 @@ namespace RJW_Menstruation
                         GoNextStage(Stage.Follicular);
                         break;
                 }
+
                 AfterSimulator();
             }
             catch (Exception ex)
@@ -1222,7 +1222,7 @@ namespace RJW_Menstruation
             float avglittersize = AverageLitterSize();
 
             float fertStartAge = Pawn.RaceProps.lifeStageAges?.Find(stage => stage.def.reproductive)?.minAge ?? 0.0f;
-            float fertEndAge = Pawn.RaceProps.lifeExpectancy * (Pawn.IsAnimal() ? RJWPregnancySettings.fertility_endage_female_animal : RJWPregnancySettings.fertility_endage_female_humanlike);
+            float fertEndAge = Pawn.RaceProps.lifeExpectancy * (Pawn.IsAnimal() ? 0.96f : 0.58f);   // RJW default fertility_endage for animal and humanlike
             if (fertEndAge < fertStartAge) fertEndAge = fertStartAge;
 
             float raceCyclesPerYear = RaceCyclesPerYear();
@@ -1263,6 +1263,11 @@ namespace RJW_Menstruation
 
         protected virtual void AfterSimulator()
         {
+            if (ShouldBeInfertile())
+            {
+                eggs.Clear();
+                GoNextStage(Stage.Infertile);
+            }
             if (EggHealth < 1f)
             {
                 if (sexNeed == null) sexNeed = Pawn.needs.TryGetNeed(VariousDefOf.SexNeed);
@@ -1727,11 +1732,7 @@ namespace RJW_Menstruation
         {
             if (curStageTicks >= currentIntervalTicks)
             {
-                if (ShouldBeInfertile())
-                {
-                    GoNextStage(Stage.Infertile);
-                }
-                else if (!IsBreedingSeason())
+                if (!IsBreedingSeason())
                 {
                     GoNextStage(Stage.Anestrus);
                 }
@@ -1853,18 +1854,20 @@ namespace RJW_Menstruation
 
         protected int PeriodRandomizer(Stage stage)
         {
+            float CycleSkew(float factor) => 1 + (cycleSpeed - 1) * factor;
+
             float variabilityFactor = (EggHealth < 1.0f) ? 6.0f : 1.0f;
             // Most cycle lengthening or shortening occurs in the follicular phase, so weight towards that
             switch (stage)
             {
                 case Stage.Follicular:
-                    return (int)(Utility.VariationRange(Props.follicularIntervalDays * GenDate.TicksPerDay, cycleVariability * 1.5f * variabilityFactor) / (1 + (cycleSpeed - 1) * 1.5f));
+                    return (int)(Utility.VariationRange(Props.follicularIntervalDays * GenDate.TicksPerDay, cycleVariability * 1.5f * variabilityFactor) / CycleSkew(1.5f));
                 case Stage.Ovulatory:
                     return Props.ovulationIntervalHours * GenDate.TicksPerHour; // No variability for now
                 case Stage.Luteal:
-                    return (int)(Utility.VariationRange(Props.lutealIntervalDays * GenDate.TicksPerDay, cycleVariability * 0.5f * variabilityFactor) / (1 + (cycleSpeed - 1) * 0.5f));
+                    return (int)(Utility.VariationRange(Props.lutealIntervalDays * GenDate.TicksPerDay, cycleVariability * 0.5f * variabilityFactor) / CycleSkew(0.5f));
                 case Stage.Bleeding:
-                    return (int)(Utility.VariationRange(Props.bleedingIntervalDays * GenDate.TicksPerDay, cycleVariability * 0.5f * variabilityFactor) / (1 + (cycleSpeed - 1) * 0.5f));
+                    return (int)(Utility.VariationRange(Props.bleedingIntervalDays * GenDate.TicksPerDay, cycleVariability * 0.5f * variabilityFactor) / CycleSkew(0.5f));
                 case Stage.Recover:
                     return (int)Utility.VariationRange(Props.recoveryIntervalDays * GenDate.TicksPerDay, 0.05f);
                 case Stage.Pregnant: