Gestational age vs actual ultrasound age on ultrasound. At my last scan I noticed my gestational age was 34w 2d which is spot on but my actual ultrasound age was 36w 0d, making my due date 13 days earlier than what it’s supposed to be? Doctor didn’t say anything, it’s just I seen it. Is it just because my baby’s measuring big or? Is it something I should ignore? Has anyone seen or experienced this before? Thanks