diff --git a/1.5/source/RJW_Menstruation/RJW_Menstruation/PregnancyCommon.cs b/1.5/source/RJW_Menstruation/RJW_Menstruation/PregnancyCommon.cs
index c572dfc..6221a81 100644
--- a/1.5/source/RJW_Menstruation/RJW_Menstruation/PregnancyCommon.cs
+++ b/1.5/source/RJW_Menstruation/RJW_Menstruation/PregnancyCommon.cs
@@ -68,6 +68,9 @@ namespace RJW_Menstruation
             PawnKindDef motherKindDef = Utility.GetRacesPawnKind(mother);
             PawnKindDef fatherKindDef = Utility.GetRacesPawnKind(father);
 
+            if (motherKindDef is CreepJoinerFormKindDef) motherKindDef = PawnKindDefOf.Colonist;
+            if (fatherKindDef is CreepJoinerFormKindDef) fatherKindDef = PawnKindDefOf.Colonist;
+
             PawnKindDef spawn_kind_def = motherKindDef;
 
             int flag = 0;