Subjects will place a surface electrode on their perineal area after a bladder-filling protocol. Transabdominal ultrasound will image the base of the bladder at rest, voluntary pelvic floor contraction, with the surface electrical stimulation and with a combined pelvic floor contraction and electrical stimulation active.

Inclusion Criteria:

• Age:18-80y
• Gender: female

Exclusion Criteria:

• Moderate-severe stress incontinence*: As determined by self-reported >3 accidents in 24-hr period
• Currently pregnant, may be pregnant (Unsure pre and peri-menopausal women should take a pregnancy test.)
• Active urinary tract infection (UTI)
• Pelvic pain, Painful bladder syndrome, underlying neurologic/neuromuscular disorder that may impact ability to partake in the trial
• implanted cardiac device or untreated cardiac arrhythmia
• Obesity as defined by BMI >= 30 (height, weight recorded)
• Anyone with impaired decision making, drug or alcohol dependence, or potentially suicidal.
• Anyone who lacks the capacity to consent for themselves or who requires a legal representative to give informed consent * Stress urinary incontinence: as determined by an answer of "Yes" to a standard question (from King's Health Questionnaire): "Do you lose urine with physical activities such as coughing, sneezing, running?"

1 day

Same as clinical trials definition

The patient was not allowed to see the ultrasound screen