What if I get pregnant while taking norethindrone?

Norethindrone (Aygestin) contains the hormone progestin and should not be taken during pregnancy. If you discover you are pregnant, let your doctor know right away. If norethindrone is taken during pregnancy, it can harm the fetus and possibly cause birth defects, particularly if it is taken in the first months of pregnancy. Because norethindrone is a reproductive hormone, the birth defects may affect the reproductive organs.