Experimental hypothyroidism during sexual development Testes size and number of spermatozoa in adulthood are determined by postnatal/pubertal proliferation of seminal tubule somatic cell constituents, the Sertoli cells. Cessation of proliferation of Sertoli cells during early development occurs concomitantly with formation of their terminally differentiated population. Transient experimental hy...

The question whether antiepileptic drugs alter thyroid function requires a better understanding. In our article, we report two sisters, one of whom was treated with levothyroxine because of hypothyroidism. Although both women received anticonvulsant therapy, transient hypothyroidism was observed only in the hypothyroid woman and was found after treatment with classic anticonvulsant agents (carb...

Continued administration of large doses of thyroid may not produce hyperthyroidism in euthyroid individuals. Cessation of prolonged high-dosage thyroid replacement can cause transient clinical and biochemical hypothyroidism owing to pituitary suppression. A case is recorded in which both these phenomena are well demonstrated. This case highlights these basic endocrinological principles.