diff --git a/1.3/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs b/1.3/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs
index 725f025..e9d0c57 100644
--- a/1.3/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs
+++ b/1.3/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs
@@ -1841,7 +1841,10 @@ namespace RJW_Menstruation
 
         protected Stage RandomStage()
         {
-            int rand = Rand.Range(0, 2);
+            int rand = Rand.ElementByWeight(
+                0, Props.folicularIntervalDays - Props.bleedingIntervalDays,
+                1, Props.lutealIntervalDays,
+                2, Props.bleedingIntervalDays);
 
             switch (rand)
             {
@@ -1849,7 +1852,7 @@ namespace RJW_Menstruation
                     curStageHrs = Rand.Range(0, (Props.folicularIntervalDays - Props.bleedingIntervalDays) * 24);
                     return Stage.Follicular;
                 case 1:
-                    curStageHrs = Rand.Range(0, Props.eggLifespanDays * 24);
+                    curStageHrs = Rand.Range(0, Props.lutealIntervalDays * 24);
                     return Stage.Luteal;
                 case 2:
                     curStageHrs = Rand.Range(0, Props.bleedingIntervalDays * 24);