Hindi ako sure exactly kung ilang days ang bank approval kasi iba-iba talaga depending sa bank at completeness ng docs mo, pero usually 3-7 business days lang siya if lahat complete na, sometimes mas matagal pa if may missing requirements, pero you don't need to wait for bank approval bago mo i-file ang maternity benefit sa SSS, pwede mo yan i-file agad pagka-deliver mo with your hospital discharge papers and birth certificate, then i-attach mo lang yung bank details later pag nag-approve na. Better to file right away para hindi ma-delay ang benefits mo!