Answer by
sanityrose (2664)
If your TSH levels are elevated, associated with hypothyroidism, a miscarriage is very likely. Levels should stay between between .24 and 2.99 during your pregnancy. Anything above or below these numbers unfortunately put your pregnancy at risk. However, if a doctor prescribes radioactive iodine to treat the thyroid, it can bring the TSH levels down and not harm your pregnancy.