Update:@2:48 It is not necessary to measure luteinizing hormone (LH); an elevated LHtoFSH ratio is not a PCOS diagnostic criterion.Polycystic Ovarian Syndrome (PCOS)Instructional Tutorial VideoCanadaQBank.comQBanks for AMC Exams, MCCEE, MCCQE & USMLEURL: • Polycystic Ovary Syndrome (PCOS)