Change OvaryPowerThreshold to better handle very long cycles. Also have climacteric severity use an InverseLerp.

1.3/source/RJW_Menstruation/RJW_Menstruation/HediffComps/HediffComp_Menstruation.cs

@@ -137,7 +137,22 @@ namespace RJW_Menstruation
         {
             get
             {
-                if (opcache < 0) opcache = (int)(72f * parent.pawn.def.race.lifeExpectancy / ThingDefOf.Human.race.lifeExpectancy);
+                if (opcache >= 0) return opcache;
+                // Climacteric will set in 6 (human) years before egg exhaustion
+                float avglittersize;
+                try
+                {
+                    avglittersize = Mathf.Max(Rand.ByCurveAverage(parent.pawn.def.race.litterSizeCurve), 1.0f);
+                }
+                catch
+                {
+                    // Any exceptions in that will have been reported elsewhere in the code by now
+                    avglittersize = 1.0f;
+                };
+                opcache = (int)(RaceCyclesPerYear() *
+                    avglittersize *
+                    6f *
+                    (parent.pawn.def.race.lifeExpectancy / ThingDefOf.Human.race.lifeExpectancy));
                 return opcache;
             }
         }
@@ -1035,7 +1050,7 @@ namespace RJW_Menstruation
                 else if (ovarypower < OvaryPowerThreshold)
                 {
                     Hediff hediff = HediffMaker.MakeHediff(VariousDefOf.Hediff_Climacteric, parent.pawn);
-                    hediff.Severity = 0.008f * (OvaryPowerThreshold - ovarypower);
+                    hediff.Severity = Mathf.InverseLerp(OvaryPowerThreshold, 0, ovarypower);
                     parent.pawn.health.AddHediff(hediff, Genital_Helper.get_genitalsBPR(parent.pawn));
                 }
             }
@@ -1391,7 +1406,7 @@ namespace RJW_Menstruation
             else if (Configurations.EnableMenopause && ovarypower < OvaryPowerThreshold)
             {
                 Hediff hediff = HediffMaker.MakeHediff(VariousDefOf.Hediff_Climacteric, parent.pawn);
-                hediff.Severity = 0.008f * i;
+                hediff.Severity = Mathf.InverseLerp(OvaryPowerThreshold, 0, ovarypower);
                 parent.pawn.health.AddHediff(hediff, Genital_Helper.get_genitalsBPR(parent.pawn));
                 GoNextStage(Stage.ClimactericLuteal);
             }

changelogs.txt

@@ -3,6 +3,7 @@ Version 1.0.7.1
  - Nipple size/transition system rewritten to be simpler under the hood. Should work with existing saves, but you might find sizes to be different, especially for very large or very small breasts.
  - Identical twins conceived after this update will have identical sex part sizes, properties, etc. upon being born.
  - Replaced HugsLib-based scheduler with normal ticking. This should reduce some 'phantom cycle' bugs.
+ - Redone calculation to determine low eggs remaining. This should cause climacteric to be applied at a more appropriate time in the pawn's life, especially for those with very long cycles.
  - For modders:
  - The function Hediff_MultiplePregnancy.ProcessIdenticalSibling is called on every identical sibling when born except the first. Any race-specfic genetic properties can be patched in there.
  - Any mods that add comps to RJW parts should copy what they need to on a postfix to Hediff_MultiplePregnancy.CopyBodyPartProperties, e.g. how menstruation itself does in that function.