<prompt> In obsetrics ultra sound commonly employed range of frequency is:-3.5-5 MHz Megahez5 - 7.5 MHz1 - 2.5 MHz8 - 10 MHz  <response>: Commonly employed range of frequency in obsetrics ultra sound - 3.5-5 Mega Hz Trans abdominal scan Obstetrical USG Range of Frequency Trans abdominal scan TAS using convex probe 3.5 - 5 Mega Hz Trnsvaginal scan TVS using TVS probe 5 - 6.5 Mega Hz 