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Congenital hypogonadotropic hypogonadism (CHH)—a rare disorder caused by deficient production, secretion or action of gonadotropin-releasing hormone—results in an absence of puberty and infertility. Here, Ulrich Boehm and colleagues summarize approaches for the diagnosis and treatment of CHH in light of recent discoveries. This Consensus Statement differs from existing guidelines for the treatment of hypogonadism as it focuses exclusively on CHH.