3D USG A Boon for Infertility A newer modality three-dimensional ultrasound (3D USG) technology, that has developed three decades ago, has been a great help in diagnosis of infertility patients. It was initially used in obstetrics; however, its success raised interest about its potential in gynecology. Studies so far demonstrated that 3D USG can be a useful and, in some areas, an indispensible tool in evaluation of the gynecology patient. As in two-dimensional ultrasound (2D USG), transvaginal approach is preferred in gynecologic examination with 3D USG. The transducer is held still close to the area of interest, and a quick sweep at the desired angle is performed. Acquired data are used to obtain a volume. The electronically stored data are processed to display three orthogonal planes. These planes can be rotated or moved as desired, and can be united to form a single 3D image. Manipulation of the acquired volume data is possible to examine a specific structure, such