However, when Ca intake is not sufficient, especially when Ca requirements are high such as the case in infancy, adolescence or pregnancy, PTH secretion becomes inadequate and hypocalcemia becomes evident.(7, 8, 9) Recurrent croup attacks in our patient were probably related to latent hypoparathyroidism which became decompensated during puberty, due to increased calcium demand which was not met by an adequate PTH response. This evidence concerns the gene PTH and hypoparathyroidism.