A study of thyroid hormones in women suffering from vomiting in pregnancy.

: Twelve pregnant women hospitalized because of hyperemesis are examined on their thyroid hormone values. Pathological values of Thyroxin T4 are found in seven patients (58%). The values of Free T4 are elevated in only three patients and all the values of Tyroxin T3 are found to be within the normal range. It is concluded that the pathological values of T4 and Free T4 do not represent thyroid disease, and the mechanism of hyperemesis gravidarum is still obscure.