AMN1 (Amnion Associated Transmembrane Protein 1): AMN1 is a gene that encodes a transmembrane protein associated with the amnion — the protective membrane surrounding the developing fetus. Although its precise function is not fully understood, research indicates it may play a role in regulating amniotic fluid and fetal development. Its significance in prenatal physiology and potential links to congenital disorders make it a subject of ongoing study.