Sexual intercourse: an unusual cause of vesicovaginal fistula.

Voluntary sexual intercourse in an adult woman with normal vagina is not a known cause of vesicovaginal fistula (VVF), though sexual abuse or sexual intercourse with young girls before reaching physical maturity can result in VVF. Postcoital VVF in an adult woman without these predisposing factors is very infrequent. A nulliparous woman who had VVF after first intercourse is presented, as it is unusual by virtue of etiology.