A patient in her twenties with Grave's disease who takes methimazole (Tapazole) tells you that she is trying to get pregnant. She asks about disease management during pregnancy. What will you tell her?

Methimazole is safe to take throughout pregnancy

The patient should discuss changing to propylthiouracil (PTU) from now until her second trimester with her provider

Propylthiouracil (PTU) should be taken throughout her pregnancy

The patient should discuss therapy with iodine-131 instead of medications with her provider