Pregnancy: Pregnancy Category C: Animal reproduction studies have not been conducted with THYROGEN.
It is also not known whether THYROGEN can cause fetal harm when administered to a pregnant woman or can affect reproductive capacity. THYROGEN should be given to a pregnant woman only if clearly needed.
Nursing Mothers: It is not known whether the drug is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when THYROGEN is administered to a nursing woman.