Would you recommend every few months or annually?
this will depend how active your sex life is and when or if you engage in risky sex. if you are active, i suggest you go in every 4 mos to make sure of the dormant period to take action as early as possible- if ever. if you engage in safe sex, annually is good enough if only to be self assured. in any case, just dont do risky sex and you'd be fine in testing whether its quartely or annualy.