Final answer:
With full bladder outlet obstruction, the fetus may develop oligohydramnios, due to reduced urine flow contributing to the amniotic fluid, potentially leading to fetal complications.
Step-by-step explanation:
With full bladder outlet obstruction, the fetus may develop oligohydramnios, which is a condition characterized by too little amniotic fluid. An obstruction can prevent the urine from entering the amniotic fluid, thus reducing its volume. Since fetal urine contributes significantly to the amniotic fluid volume after the kidneys begin to function, a blockage in urinary flow can lead to decreased amounts of amniotic fluid. This condition, oligohydramnios, can result in complications such as fetal contractures and hypoplastic lungs.