ERBB2 expression plays an important, but as yet uncharacterized, role in the kidney during fetal development in rats and in the skin, lung, and intestine.14 Fetal kidney failure, leading to oligohydramnios, and subsequently to pulmonary hypoplasia and neonatal respiratory disorders, has been described in a Potter sequence.15 This evidence concerns the gene ERBB2 and oligohydramnios.