However, at the age of 18 months, Dylan was diagnosed with Pseudohypoparathyroidism, a genetic disorder where the body is unable to respond to the parathyroid hormone, causing impaired growth, speech and mobility problems and learning difficulties.
Human placental production of 1-alpha, 25-dihydroxyvitamin D3: biochemical characterization and production in normal subjects and patients with pseudohypoparathyroidism.