diff --git a/1.5/Languages/English/Keyed/RJW_Menstruation.xml b/1.5/Languages/English/Keyed/RJW_Menstruation.xml
index 08b7327..7aa650e 100644
--- a/1.5/Languages/English/Keyed/RJW_Menstruation.xml
+++ b/1.5/Languages/English/Keyed/RJW_Menstruation.xml
@@ -133,7 +133,7 @@
   <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>Enable multiple babies/twins in a single Biotech pregnancy.</Option_EnableBiotechTwins_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>
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 cdf9afd..ae03413 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
@@ -125,7 +125,7 @@ namespace RJW_Menstruation
         protected bool estrusflag = false;
         protected float? ovulationChanceCache = null;   // Dirtied every simulation
         protected float? implantationChanceCache = null;
-        protected int? opcache = null;
+        protected int opcache = -1;
         protected float antisperm = 0.0f;
         // RJW pregnancy, or Biotech pregnancy/labor/laborpushing
         protected Hediff pregnancy = null;
@@ -197,14 +197,14 @@ namespace RJW_Menstruation
         {
             get
             {
-                if (opcache.HasValue) return opcache.Value;
+                if (opcache > 0) return opcache;
                 const float yearsBeforeMenopause = 6.0f;
                 opcache = (int)(RaceCyclesPerYear() *
                     AverageLitterSize() *
                     yearsBeforeMenopause *
                     (Pawn.RaceProps.lifeExpectancy / ThingDefOf.Human.race.lifeExpectancy));
-                if (opcache <= 0) opcache = 1;
-                return opcache.Value;
+                if (opcache == 0) opcache = 1;
+                return opcache;
             }
         }
 
@@ -655,7 +655,7 @@ namespace RJW_Menstruation
             estrusLevel = Props.concealedEstrus ? EstrusLevel.Concealed : EstrusLevel.Visible;
             ovulationFactor = 1f;
             noBleeding = false;
-            opcache = null;
+            opcache = -1;
 
             if (Pawn.genes == null || !ModsConfig.BiotechActive) return;
             foreach (MenstruationModExtension extension in Pawn.genes.GenesListForReading.Where(gene => gene.Active).Select(gene => gene.def.GetModExtension<MenstruationModExtension>()).Where(ext => ext != null))
@@ -971,7 +971,7 @@ namespace RJW_Menstruation
             if (Pawn.HasIUD()) antisperm = 0.70f + asafactor;
             else antisperm = 0.0f + asafactor;
 
-            absorber = Pawn.apparel?.WornApparel.OfType<Absorber>().FirstOrDefault();
+            absorber = (Absorber)Pawn.apparel?.WornApparel.Find(x => x is Absorber);
             if (absorber != null)
             {
                 absorber.WearEffect(TickInterval);
@@ -1390,12 +1390,6 @@ namespace RJW_Menstruation
                     deadeggs.Add(egg);
                     continue;
                 }
-                else if (ModsConfig.BiotechActive && !Find.Storyteller.difficulty.ChildrenAllowed)
-                {
-                    if (Configurations.Debug) Log.Message($"Could not implant {Pawn}'s egg due to children being disabled");
-                    deadeggs.Add(egg);
-                    continue;
-                }
                 else if (Rand.Chance(Configurations.ImplantationChance * ImplantChance * InterspeciesImplantFactor(egg.fertilizer)))
                 {
                     try
diff --git a/1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_PregeneratedBabies.cs b/1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_PregeneratedBabies.cs
index 505d9be..2f6cea5 100644
--- a/1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_PregeneratedBabies.cs
+++ b/1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_PregeneratedBabies.cs
@@ -43,14 +43,14 @@ namespace RJW_Menstruation
             switch (parent)
             {
                 case Hediff_Pregnant hediff_Pregnant:
-                    Hediff_Labor labor = Pawn.health.hediffSet.hediffs.OfType<Hediff_Labor>().MaxByWithFallback(hediff => hediff.loadID);
+                    Hediff_Labor labor = (Hediff_Labor)Pawn.health.hediffSet.hediffs.Where(hediff => hediff is Hediff_Labor).MaxByWithFallback(hediff => hediff.loadID);
                     HediffComp_PregeneratedBabies laborcomp = labor?.TryGetComp<HediffComp_PregeneratedBabies>();
                     if (laborcomp == null) return;
                     laborcomp.babies = this.babies;
                     laborcomp.enzygoticSiblings = this.enzygoticSiblings;
                     break;
                 case Hediff_Labor hediff_Labor:
-                    Hediff_LaborPushing pushing = Pawn.health.hediffSet.hediffs.OfType<Hediff_LaborPushing>().MaxByWithFallback(hediff => hediff.loadID);
+                    Hediff_LaborPushing pushing = (Hediff_LaborPushing)Pawn.health.hediffSet.hediffs.Where(hediff => hediff is Hediff_LaborPushing).MaxByWithFallback(hediff => hediff.loadID);
                     HediffComp_PregeneratedBabies pushingcomp = pushing?.TryGetComp<HediffComp_PregeneratedBabies>();
                     if (pushingcomp == null) return;
                     pushingcomp.babies = this.babies;
@@ -103,6 +103,7 @@ namespace RJW_Menstruation
                     {
                         firstbaby = baby;
                         request.FixedGender = baby.gender;
+                        request.ForcedEndogenes = baby.genes?.Endogenes.Select(gene => gene.def).ToList();
                     }
                     else
                     {
diff --git a/1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/MenstruationUtility.cs b/1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/MenstruationUtility.cs
index a8e873f..7a42bae 100644
--- a/1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/MenstruationUtility.cs
+++ b/1.5/source/RJW_Menstruation/RJW_Menstruation/HediffComps/MenstruationUtility.cs
@@ -395,10 +395,23 @@ namespace RJW_Menstruation
 
         public static HediffComp_Menstruation.EstrusLevel HighestEstrus(this Pawn pawn)
         {
-            return pawn.GetMenstruationComps().
-                Select(comp => comp.GetEstrusLevel()).
-                DefaultIfEmpty(HediffComp_Menstruation.EstrusLevel.None).
-                Max();
+            HediffComp_Menstruation.EstrusLevel res = HediffComp_Menstruation.EstrusLevel.None;
+
+            foreach(HediffComp_Menstruation comp in pawn.GetMenstruationComps())
+            {
+                switch (comp.GetEstrusLevel())
+                {
+                    case HediffComp_Menstruation.EstrusLevel.None:
+                        break;
+                    case HediffComp_Menstruation.EstrusLevel.Concealed:
+                        res = HediffComp_Menstruation.EstrusLevel.Concealed;
+                        break;
+                    case HediffComp_Menstruation.EstrusLevel.Visible:
+                        return HediffComp_Menstruation.EstrusLevel.Visible;
+                }
+            }    
+
+            return res;
         }
 
         public static bool HasIUD(this Pawn pawn)
@@ -428,10 +441,21 @@ namespace RJW_Menstruation
         public static float DamagePants(this Pawn pawn, float fluidAmount)
         {
             if (pawn.apparel == null) return 0;
-            if (!pawn.apparel.WornApparel.
-                Where(apparel => apparel.def.apparel.bodyPartGroups.Contains(BodyPartGroupDefOf.Legs)).
-                TryMinBy(apparel => apparel.def.apparel.LastLayer.drawOrder, out Apparel pants))
-                return 0;
+            Apparel pants = null;
+            foreach(Apparel apparel in pawn.apparel.WornApparel.Where(app => app.def.apparel.bodyPartGroups.Contains(BodyPartGroupDefOf.Legs)))
+            {
+                if (apparel.def.apparel.LastLayer == ApparelLayerDefOf.OnSkin)
+                {
+                    pants = apparel;
+                    break;
+                }
+                else if (pants == null || apparel.def.apparel.LastLayer == ApparelLayerDefOf.Middle)
+                    // Either grab whatever's available or reassign the pants from shell to a middle
+                    pants = apparel;
+                // Pants are middle and this is a shell
+                else continue;
+            }
+            if (pants == null) return 0;
 
             const float HPPerMl = 0.5f;
 
diff --git a/1.5/source/RJW_Menstruation/RJW_Menstruation/Hediff_MultiplePregnancy.cs b/1.5/source/RJW_Menstruation/RJW_Menstruation/Hediff_MultiplePregnancy.cs
index 31e2027..f8f4d3e 100644
--- a/1.5/source/RJW_Menstruation/RJW_Menstruation/Hediff_MultiplePregnancy.cs
+++ b/1.5/source/RJW_Menstruation/RJW_Menstruation/Hediff_MultiplePregnancy.cs
@@ -343,6 +343,7 @@ namespace RJW_Menstruation
 
                         firstbaby = baby;
                         request.FixedGender = baby.gender;
+                        request.ForcedEndogenes = baby.genes?.Endogenes.Select(gene => gene.def).ToList();                        
                     }
                     else
                     {
diff --git a/About/ModIcon.png b/About/ModIcon.png
deleted file mode 100644
index f12d8f5..0000000
Binary files a/About/ModIcon.png and /dev/null differ