Diagrams and B-mode images showing the position of the transducer in the transabdominal and intracavitary approaches and the anatomical landmarks. Leftside diagrams do not represent exact dimensions. Adapted from (Rosado-Mendez, Guerrero, Drehfal, Santoso, Subramanian, Kohn, Shotzko, Palmeri, Feltovich & Hall 2016), with the permission of AIP Publishing.