diff --git a/1.4/Assemblies/RJW_Menstruation.dll b/1.4/Assemblies/RJW_Menstruation.dll
index ae8c52b..91b7c94 100644
Binary files a/1.4/Assemblies/RJW_Menstruation.dll and b/1.4/Assemblies/RJW_Menstruation.dll differ
diff --git a/1.4/Languages/English/Keyed/RJW_Menstruation.xml b/1.4/Languages/English/Keyed/RJW_Menstruation.xml
index d8d471e..8ff0f64 100644
--- a/1.4/Languages/English/Keyed/RJW_Menstruation.xml
+++ b/1.4/Languages/English/Keyed/RJW_Menstruation.xml
@@ -132,6 +132,7 @@
   <CustomHybrid_List_Title>Custom Hybrid Editor</CustomHybrid_List_Title>
   <CustomHybrid_Title>Hybrids of {0}</CustomHybrid_Title>
   <CustomHybrid_Tooltip>When {0} breed with {1}, {2} will be born at {3} chance.&#10;If both races have hybrid definitions for each other, the father's definition will be used.</CustomHybrid_Tooltip>
-  
 
+  <CannotNoEggs>No eggs</CannotNoEggs>
+    
 </LanguageData>
\ No newline at end of file
diff --git a/1.4/MilkModule/Assemblies/MilkModule.dll b/1.4/MilkModule/Assemblies/MilkModule.dll
index 7c22131..0adf6be 100644
Binary files a/1.4/MilkModule/Assemblies/MilkModule.dll and b/1.4/MilkModule/Assemblies/MilkModule.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 29b54cc..24fa00e 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
@@ -1030,7 +1030,7 @@ namespace RJW_Menstruation
             if (cycleVariability < 0f) cycleVariability = MenstruationUtility.RandomVariabilityPercent();
             if (currentIntervalHours < 0)
             {
-                if (Pawn.health.capacities.GetLevel(xxx.reproduction) <= 0) curStage = Stage.Infertile;
+                if (Pawn.health.capacities.GetLevel(xxx.reproduction) <= 0 || Pawn.SterileGenes()) curStage = Stage.Infertile;
                 else if (!IsBreedingSeason()) curStage = Stage.Anestrus;
                 else curStage = RandomStage();
                 if (curStage == Stage.Follicular)
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 2257c55..7bbdefb 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
@@ -2,6 +2,7 @@
 using System.Linq;
 using RimWorld;
 using Verse;
+using System.Collections.Generic;
 
 namespace RJW_Menstruation
 {
@@ -61,4 +62,50 @@ namespace RJW_Menstruation
                 __result = 0.999f;
         }
     }
+
+    [HarmonyPatch(typeof(Recipe_ExtractOvum), nameof(Recipe_ExtractOvum.AvailableReport))]
+    public class ExtractOvum_AvailableReport_Patch
+    {
+        public static void PostFix(Thing thing, ref AcceptanceReport __result)
+        {
+            if (!__result.Accepted) return;
+            Pawn pawn = (Pawn)thing;
+            if (pawn.IsRJWPregnant())
+            {
+                __result = "CannotPregnant".Translate();
+                return;
+            }
+            List<HediffComp_Menstruation> comps = pawn.GetMenstruationComps().ToList();
+            if (!comps.Any()) return;
+            if (comps.All(comp => comp.ovarypower <= 0))
+            {
+                __result = Translations.CannotNoEggs;
+                return;
+            }
+            return;
+        }
+    }
+
+    [HarmonyPatch(typeof(Recipe_ExtractOvum), "OnSurgerySuccess")]
+    public class ExtractOvum_OnSurgerySuccess_Patch
+    {
+        public static void PostFix(Pawn pawn)
+        {
+            List<HediffComp_Menstruation> comps = pawn.GetMenstruationComps().ToList();
+            if (!comps.Any()) return;
+            HediffComp_Menstruation mostEggs = comps.MaxBy(comp => comp.ovarypower);
+            if (mostEggs.ovarypower <= 0) return;   // Shouldn't happen
+            mostEggs.ovarypower--;
+        }
+    }
+
+    [HarmonyPatch(typeof(Recipe_ImplantEmbryo), nameof(Recipe_ImplantEmbryo.ApplyOnPawn))]
+    public class ImplantEmbryo_ApplyOnPawn_Patch
+    {
+        public static void PostFix(Pawn pawn)
+        {
+            foreach (HediffComp_Menstruation comp in pawn.GetMenstruationComps())
+                comp.TakeLoosePregnancy();
+        }
+    }
 }
\ No newline at end of file
diff --git a/1.4/source/RJW_Menstruation/RJW_Menstruation/Translations.cs b/1.4/source/RJW_Menstruation/RJW_Menstruation/Translations.cs
index 973a90b..35d95c8 100644
--- a/1.4/source/RJW_Menstruation/RJW_Menstruation/Translations.cs
+++ b/1.4/source/RJW_Menstruation/RJW_Menstruation/Translations.cs
@@ -135,6 +135,8 @@ namespace RJW_Menstruation
         public static readonly string Gizmo_GatherCum = "Gizmo_GatherCum".Translate();
         public static readonly string FloatMenu_CleanSelf = "FloatMenu_CleanSelf".Translate();
 
+        public static readonly string CannotNoEggs = "CannotNoEggs".Translate();
+
         public static readonly string CustomHybrid_List_Title = "CustomHybrid_List_Title".Translate();
         static public string CustomHybrid_Title(string label) { return TranslatorFormattedStringExtensions.Translate("CustomHybrid_Title", label); }
         static public string CustomHybrid_Tooltip(string label, string breedee, string baby, string chance) { return TranslatorFormattedStringExtensions.Translate("CustomHybrid_Tooltip", label, breedee, baby, chance); }
diff --git a/changelogs.txt b/changelogs.txt
index 32469b1..9d26535 100644
--- a/changelogs.txt
+++ b/changelogs.txt
@@ -1,5 +1,7 @@
 Version 1.0.8.2
  - Updated race support patches for new and removed vaginas.
+ - The Biotech extract ovum operation will now remove an egg from a pawn's ovaries.
+ - A pawn's womb should now recognize an implanted embryo.
 
 Version 1.0.8.1
  - Added the option for humans to start Biotech pregnancies if the DLC is enabled. If set, non-humans will use the old multiple pregnancy instead.