Oligohydramnios --> compression of developing fetus --> limb deformities, facial anomalies (e.g. low-set ears and retrognathia, flattened nose--> compression of chest and lack of amniotic fluid aspiration into fetal lungs --> pulmonary hypoplasia

Causes include ARPKD, obstructive uropathy, bilateral renal agenesis, chronic placental insufficiency

"Babies who cant Pee in utero develop Potter sequence"