Rarely, invasive procedures such as electroejaculation or epididymal or testicular sperm aspiration have been successfully implemented (Hovav et al., 1996; Vanderschueren et al., 1998). Occasionally, cancellation of these particular treatment cycles is required. If you have sickle cell disease. We describe, for the first time, the use of Viagra during ART treatments for cases of temporary erectile dysfunction. Such cases emphasize the need to think in advance of this potential use of Viagra during ART.