- Must agree to have a medically supervised pregnancy test with a minimum sensitivity of 25 IU/mL (i.e., negative pregnancy test) at screening for eligibility and then every 28 days while on study. For any FCBP, pregnancy testing must continue at the same frequency as during the MM-021 study. If regular or no menstrual cycles, she must agree to ongoing pregnancy testing during the course of the study (every 28 days), during dose interruptions, at study discontinuation and 28 days following study drug discontinuation. If menstrual cycles are irregular, pregnancy testing must occur every 14 days while on study, at study discontinuation and at 14 and 28 days following study drug discontinuation. This requirement also applies to females of childbearing potential who practice complete and continued sexual abstinence.