FCOG-1196

A 23-year-old woman at 36 weeks of gestation visits your clinic for follow up. On pelvic ultrasound you noted a decrease in amniotic fluid, and all her previous scans were normal. When asked she recollected on experiencing an episode of urinary incontinence yesterday, were she had wet her undergarment with a sudden gush of clear fluid. Considering the presentation, which of the following is MOST likely the cause of oligohydramnios in this patient?