... Portable structure and it can be applied in the internal organs of the abdomen and in the gynecology and obstetrics diagnosis. Functional ... survey and calculate the distance, the area, the perimeter, the heart rate, and the pregnant week (five ways: BPD, GS, CRL, ... .5MHz/3.0MHz/3.5MHz/4.0MHzCalculation: distance, perimeter, area, heart rate, pregnancy week (BPD, GS, CRL, FL, AC) and expected ...