A glomerular disease characterized by severe renal failure and nephrotic syndrome at birth, which rapidly improve in the first weeks of life. The disease is congenital membranous nephropathy due to maternal anti-neutral endopeptidase alloimmunization (Monarch Disease Ontology entry MONDO_0019068). Also known as: FMAIG, alloimmune neonatal renal disease, fetomaternal alloimmunization with antenatal glomerulopathies, neonatal glomerulopathy due to Neprilysin alloimmunization, neonatal glomerulopathy due to neprilysin alloimmunization, neonatal membranous glomerulopathy with maternal NEP deficiency, neonatal membranous glomerulopathy with maternal neutral endopeptidase deficiency.