NPHP1 and kidney failure: In fetuses 14 and 15, an 865‐kb microduplication was found at 2q13, which affects NPHP1. Mutation or homozygous deletion in NPHP1 has been reported in patients with genetic syndromes with renal failure, intellectual disability, growth retardation, autism, and language delay (Wolf & Hildebrandt, 2011).