A 27-year-old house wife, gravida ii, para 0, developed hypoparathyroidism following subtotal thyroidectomy for follicular adenocarcinoma which had been performed about 4 years previously. Hypoparathyroidism was not adequately controlled apparently owing to lack of cooperation on the part of the patient. Nevertheless, she became pregnant about 3 years postoperatively and was spontaneously delivered of a 2,700 grams living female infant at the 38th week of pregnancy without any maternal complications.After delivery, the infant was found to have craniotabes. All of her skeletons was found to be decalcified and porotic on roentgenogram. Chemical changes in the blood and urine of the mother and the newborn were presented and pertinent lituratures were reviewed.