Urination: Discharge of URINE, liquid waste processed by the KIDNEY, from the body.Urination Disorders: Abnormalities in the process of URINE voiding, including bladder control, frequency of URINATION, as well as the volume and composition of URINE.Toilet Training: Conditioning to defecate and urinate in culturally acceptable places.Generalization, Response: The principle that after an organism learns to respond in a particular manner to a stimulus, that stimulus is effective in eliciting similar responses.Defecation: The normal process of elimination of fecal material from the RECTUM.Urinary Retention: Inability to empty the URINARY BLADDER with voiding (URINATION).Urinary Bladder: A musculomembranous sac along the URINARY TRACT. URINE flows from the KIDNEYS into the bladder via the ureters (URETER), and is held there until URINATION.Cystitis, Interstitial: A condition with recurring discomfort or pain in the URINARY BLADDER and the surrounding pelvic region without an identifiable disease. Severity of pain in interstitial cystitis varies greatly and often is accompanied by increased urination frequency and urgency.Urinary Incontinence: Involuntary loss of URINE, such as leaking of urine. It is a symptom of various underlying pathological processes. Major types of incontinence include URINARY URGE INCONTINENCE and URINARY STRESS INCONTINENCE.