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Recent spectroscopic observations have identified several cataclysmicvariables non-solar metal abundances. We present theoretical models whichexamine the level of core evolution expected for CV secondaries prior tocontact. Our results indicate that few secondary stars evolve past 10% of theirmain sequence lifetime prior to the initiation of mass transfer; a result whichis in agreement with present day observations. Thus, the non-solar metalabundances observed must be due to nuclear burning by-products accreted by thesecondary star during common envelope sweeping prior to initial contact orejecta collected during classical nova outbursts.Comment: To Appear in PAS

How Evolved are the Mass Donor Stars in Cataclysmic Variables?