Hi , I have thyroid when I am having my secong child but when I discovered that I had thyroid , its already too late coz its already 20 wks. As my thyroid was very serious at that time n I am allergic to the medicine which is safe for pregnancy, therefore I have to take the normal medicine but its will slightly affect the baby, its best to consult a endocrine n a gynae together during pregnancy as its a risk to have thyroid during pregnancy. Even I was having my third & fourth child, I am still on medication. As long as u maintain your thyroid level, it will be safe for u n the baby.