. "Any process that activates or increases the frequency, rate or extent of ovarian cumulus cell differentiation." . . . . "positive regulation of cumulus cell differentiation" . "activation of cumulus cell differentiation" . "positive regulation of ovarian cumulus cell differentiation" . "stimulation of cumulus cell differentiation" . "up regulation of cumulus cell differentiation" . "up-regulation of cumulus cell differentiation" . "upregulation of cumulus cell differentiation" . .