2. Questions. What Measurement is the most accurate for ultrasound dating? In what order do fetal structures appear? What are the 7 items to document in 1st trimester ultrasounds?. Objectives. Review the indications for first trimester ultrasoundDiscuss utilization of ultrasound and laboratory data in the evaluation of first trimester bleedingReview measurements and how they apply to dating criteriaDiscuss how to document a first trimester ultrasound in the medical record.