Clinical presentation: A 42-year-old man was referred for evaluation of a hypothyroidism which was discovered on evaluation of repeated stillbirth.

Palpation. No abnormality.

Laboratory tests: TSH 6.51 mIU/L, FT4 13.2 pM/L, aTPO 209 U/mL.

Ultrasonography. The thyroid was minimally hypoechogenic. There were no discrete lesions within.

Diagnosis. Hashimoto's thyroiditis. Subclinical hypothyroidism. Daily 50 microgram levothyroxine was suggested.