Pelvis or abdomen, pregnancy‑related or pregnancy complication, fetal development and anatomy, ultrasound (the current ultrasound) scan of, by any or all approaches, with measurement of all parameters for dating purposes, if: (a) the dating of the pregnancy (as confirmed by the current ultrasound) is 17 to 22 weeks of gestation; and (b) the current ultrasound: (i) is not performed in the same pregnancy as item 55706; and (ii) is not performed on the same patient within 24 hours of a service mentioned in item 55757 or 55758 (NR)