What causes urination during intercourse?

The loss of urine during sexual intercourse could be caused by stress urinary incontinence (SUI) or overactive bladder (OAB). Based on clinical series, the loss of urine can occur during penetration or during orgasm. The majority of women experienced loss of urine during penetration. When bladder tests (urodynamics studies) were performed, urinary incontinence with penetration was strongly correlated with SUI, while urinary incontinence from orgasm was strongly correlated with OAB. 

The loss of urine during intercourse can lead to embarrassment and even female sexual dysfunction. Many women experience minor leakage of urine from time to time. Emptying the bladder or cutting back on fluids prior to intercourse can be helpful. If loss of urine during intercourse is a frequent occurrence, contact your doctor or healthcare provider for a full discussion of possible treatment options for SUI and/or OAB.