Only do the pregnancy rechecks after a mech implant or insect egging

1.3/source/RJW_Menstruation/RJW_Menstruation/Patch/RJW_Patch.cs

@@ -54,7 +54,9 @@ namespace RJW_Menstruation
         {
             Pawn pawn = props.partner;
 
-            // A pregnancy might have been destroyed by a mech or insect implantation, so double-check them all
+            if (props.sexType != xxx.rjwSextype.MechImplant && !pawn.health.hediffSet.GetHediffs<Hediff_InsectEgg>().Any()) return;
+
+            // The existing pregnancies might have been destroyed, so go through see if any new mech pregnancies need to be picked up
             foreach (HediffComp_Menstruation comp in pawn.GetMenstruationComps())
             {
                 _ = comp.Pregnancy; // get_Pregnancy will do any removals