ethylenethiourea ( etu ) was given by gavage at a dose of 40 mg/kg/day from days 7 through 15 of gestation to hypothyroid and euthyroid rats , and to rats given exogenous thyroxine , to determine whether etu teratogenicity occurs through alteration of maternal thyroid function .
C0020676
hypothyroid
C0040165
thyroxine