... such five display modes as B, B/B, 4B,B+M, and M. Under the B mode there are six magnifications ... rate, and the pregnant week (five ways: BPD, GS, CRL, FL, and the AC) and so on ... 4002, 4003 and 4003(workstation)Display mode: Convex array: B, B/B,4B, B+M, and MMagnification: ×0.8, ×1.0, ... distance, perimeter, area, heart rate, pregnancy week (BPD, GS, CRL, FL, AC) and expected date of childbirthNote: ...