diff --git a/1.4/Assemblies/RJW_Menstruation.dll b/1.4/Assemblies/RJW_Menstruation.dll
index 852e240..58c8a88 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 f28203c..3df2d06 100644
--- a/1.4/Languages/English/Keyed/RJW_Menstruation.xml
+++ b/1.4/Languages/English/Keyed/RJW_Menstruation.xml
@@ -124,6 +124,8 @@
   <Option_PregnancyFromBaseRJW_Label>Use basic RJW pregnancy</Option_PregnancyFromBaseRJW_Label>
   <Option_PregnancyFromMultiplePregnancy_Label>Use menstruation multiple pregnancy</Option_PregnancyFromMultiplePregnancy_Label>
   <Option_PregnancyFromBiotech_Label>Use Biotech pregnancy</Option_PregnancyFromBiotech_Label>
+  <Option_EnableBiotechTwins_Label>(EXPERIMENTAL) Enable multiple babies/twins in a single Biotech pregnancy.</Option_EnableBiotechTwins_Label>
+  <Option_EnableBiotechTwins_Desc>Enabling this option will allow identical and hetero ovular twins with Biotech.&#10;Also allows the hybrid system, but two humanlikes cannot produce an animal.</Option_EnableBiotechTwins_Desc>
   <Option_EnableDraftedIcon_Label>Show womb status when drafted</Option_EnableDraftedIcon_Label>
   <Option_EnableDraftedIcon_Desc>Draw womb icon for drafted pawns</Option_EnableDraftedIcon_Desc>
   <Button_ResetToDefault>Reset to default</Button_ResetToDefault>
diff --git a/1.4/source/RJW_Menstruation/RJW_Menstruation/Configurations.cs b/1.4/source/RJW_Menstruation/RJW_Menstruation/Configurations.cs
index 326e15b..d485f5e 100644
--- a/1.4/source/RJW_Menstruation/RJW_Menstruation/Configurations.cs
+++ b/1.4/source/RJW_Menstruation/RJW_Menstruation/Configurations.cs
@@ -437,7 +437,9 @@ namespace RJW_Menstruation
             if (listmain.RadioButton(Translations.Option_PregnancyFromMultiplePregnancy_Label, Configurations.PregnancySource == Configurations.PregnancyType.MultiplePregnancy))
                 Configurations.PregnancySource = Configurations.PregnancyType.MultiplePregnancy;
             if (ModsConfig.BiotechActive && listmain.RadioButton(Translations.Option_PregnancyFromBiotech_Label, Configurations.PregnancySource == Configurations.PregnancyType.Biotech))
-                    Configurations.PregnancySource = Configurations.PregnancyType.Biotech;
+                Configurations.PregnancySource = Configurations.PregnancyType.Biotech;
+            if (Configurations.PregnancySource == Configurations.PregnancyType.Biotech)
+                listmain.CheckboxLabeled(Translations.Option_EnableBiotechTwins_Label, ref Configurations.EnableBiotechTwins, Translations.Option_EnableBiotechTwins_Desc);
             if (Configurations.PregnancySource == Configurations.PregnancyType.MultiplePregnancy ||
                 (Configurations.PregnancySource == Configurations.PregnancyType.Biotech && Configurations.EnableBiotechTwins))
             {
diff --git a/1.4/source/RJW_Menstruation/RJW_Menstruation/Translations.cs b/1.4/source/RJW_Menstruation/RJW_Menstruation/Translations.cs
index 8534281..7b0862d 100644
--- a/1.4/source/RJW_Menstruation/RJW_Menstruation/Translations.cs
+++ b/1.4/source/RJW_Menstruation/RJW_Menstruation/Translations.cs
@@ -125,6 +125,8 @@ namespace RJW_Menstruation
         public static readonly string Option_PregnancyFromBaseRJW_Label = "Option_PregnancyFromBaseRJW_Label".Translate();
         public static readonly string Option_PregnancyFromMultiplePregnancy_Label = "Option_PregnancyFromMultiplePregnancy_Label".Translate();
         public static readonly string Option_PregnancyFromBiotech_Label = "Option_PregnancyFromBiotech_Label".Translate();
+        public static readonly string Option_EnableBiotechTwins_Label = "Option_EnableBiotechTwins_Label".Translate();
+        public static readonly string Option_EnableBiotechTwins_Desc = "Option_EnableBiotechTwins_Desc".Translate();
         public static readonly string Option_EnableDraftedIcon_Label = "Option_EnableDraftedIcon_Label".Translate();
         public static readonly string Option_EnableDraftedIcon_Desc = "Option_EnableDraftedIcon_Desc".Translate();
 
diff --git a/changelogs.txt b/changelogs.txt
index 2beba13..263dbc4 100644
--- a/changelogs.txt
+++ b/changelogs.txt
@@ -1,6 +1,7 @@
 Version 1.0.8.6
  - Updated Traditional Chinese translation by Hydrogen.
  - Added several menstruation-related genes.
+ - Added experimental support for twins and hybrids with Biotech pregnancies, disabled by default.
 
 Version 1.0.8.5
  - Added biosculpter recipe to restore 1 year's worth of eggs, with icon by DestinyPlayer.