diff --git a/1.4/Assemblies/RJW_Menstruation.dll b/1.4/Assemblies/RJW_Menstruation.dll
index e6dba69..d7f14ce 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_Menstruation.cs b/1.4/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs
index 9e3851b..05a4dba 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
@@ -319,7 +319,6 @@ namespace RJW_Menstruation
                         fertilityByAge.TransformValue(StatRequest.For(Pawn), ref factor);
                         if (factor <= 0.0f) return 0.0f;    // Too young or too old
                     }
-                    else part.TransformValue(StatRequest.For(Pawn), ref ovulationChance);
                 }
                 if (Pawn.HasQuirk(QuirkUtility.Quirks.Breeder)) ovulationChance *= 10.0f;
                 try
diff --git a/1.4/source/RJW_Menstruation/RJW_Menstruation/Patch/Biotech_Patch.cs b/1.4/source/RJW_Menstruation/RJW_Menstruation/Patch/Biotech_Patch.cs
index 4697141..6950552 100644
--- a/1.4/source/RJW_Menstruation/RJW_Menstruation/Patch/Biotech_Patch.cs
+++ b/1.4/source/RJW_Menstruation/RJW_Menstruation/Patch/Biotech_Patch.cs
@@ -219,6 +219,16 @@ namespace RJW_Menstruation
         }
     }
 
+    [HarmonyPatch(typeof(StatPart_FertilityByGenderAge), "AgeFactor")]
+    public class AgeFactor_Patch
+    {
+        public static void Postfix(ref float __result, Pawn pawn)
+        {
+            if (pawn.GetMenstruationComps().Any(comp => comp.CalculatingOvulationChance))
+                __result = 1.0f;
+        }
+    }
+
     //[HarmonyPatch(typeof(ChildcareUtility), nameof(ChildcareUtility.SuckleFromLactatingPawn))]
     //public class GreedyConsume_Patch
     //{
diff --git a/1.4/source/RJW_Menstruation/RJW_Menstruation/Patch/RJW_Patch.cs b/1.4/source/RJW_Menstruation/RJW_Menstruation/Patch/RJW_Patch.cs
index 31a3688..5176542 100644
--- a/1.4/source/RJW_Menstruation/RJW_Menstruation/Patch/RJW_Patch.cs
+++ b/1.4/source/RJW_Menstruation/RJW_Menstruation/Patch/RJW_Patch.cs
@@ -374,26 +374,13 @@ namespace RJW_Menstruation
         }
     }
 
-    [HarmonyPatch(typeof(PawnCapacityWorker_Fertility), nameof(PawnCapacityWorker_Fertility.CalculateCapacityLevel))]
-    public static class PawnCapacityWorker_Fertility_Patch
+    [HarmonyPatch(typeof(PawnCapacityWorker_Fertility), "CalculateAgeImpact")]
+    public static class PawnCapacityWorker_Fertility_Age_Patch
     {
-        private static float GetFertilityStatOrOne(Thing thing, StatDef stat, bool applyPostProcess, int cacheStaleAfterTicks)
+        public static void Postfix(ref float __result, Pawn pawn)
         {
-            Pawn pawn = (Pawn)thing;
             if (pawn.GetMenstruationComps().Any(comp => comp.CalculatingOvulationChance))
-                return 1.0f;
-            else return thing.GetStatValue(stat, applyPostProcess, cacheStaleAfterTicks);
-        }
-        private static readonly MethodInfo GetStatValue = AccessTools.Method(typeof(StatExtension), "GetStatValue", new System.Type[] { typeof(Thing), typeof(StatDef), typeof(bool), typeof(int) });
-        public static IEnumerable<CodeInstruction> Transpiler(IEnumerable<CodeInstruction> instructions)
-        {
-            if (GetStatValue?.ReturnType != typeof(float)) throw new System.InvalidOperationException("GetStatValue not found");
-            foreach (CodeInstruction instruction in instructions)
-            {
-                if (instruction.Calls(GetStatValue))
-                    yield return CodeInstruction.Call(typeof(PawnCapacityWorker_Fertility_Patch), nameof(GetFertilityStatOrOne));
-                else yield return instruction;
-            }
+                __result = 1f;
         }
     }
 }
diff --git a/changelogs.txt b/changelogs.txt
index d7aaa6b..c4babf8 100644
--- a/changelogs.txt
+++ b/changelogs.txt
@@ -1,6 +1,7 @@
 Version 1.0.9.2
  - Updated Traditional Chinese translation by Hydrogen.
  - Fixed the no bleeding gene having positive metabolic efficiency instead of negative.
+ - Fixed ovulation chance not accounting for genes or precepts.
  - Better handle wombs that are not in the genitals body part.
  - Handle errors more gracefully when starting a pregnancy.
  - Fix implanting multiple eggs in an animal when configured to use Biotech pregnancies.