In childhood, the pituitary gland secretes too little growth hormone, suffering from dwarfism and gigantism; Adult secretory acromegaly. Hyposecretion of thyroid hormone in infancy, dementia. Adults secrete more hyperthyroidism and less mucinous edema; Iodine deficiency goiter, commonly known as big neck disease. Insufficient insulin secretion, diabetes. Sometimes pituitary lesions can lead to abnormal milk secretion in female animals. At the same time, the pituitary gland secretes insufficient gonadotropin, which will lead to the dysplasia of thyroid gland, gonad and other organs.

Growth hormone childhood: too few dwarfism and too many gigantism; Adult: acromegaly

Thyroid hormone childhood: oligozoospermia; Adult: Hyperthyroidism, scientific name endemic hyperthyroidism.