Some women unfortunately have suffered from thyroid cancer and then worry about whether they should get pregnant, and if they do get pregnant, whether there will be any affect, and the short answer is that in the vast majority of women there is no need to particularly worry. Now these women will be on a large dose of thyroxine to suppress their thyroid-stimulating hormone. There’s no evidence that pregnancy has an adverse effect on thyroid cancer. Normally a woman can conceive and have a baby while having been treated for thyroid cancer.