I'm a tensed to be mom, I am in the 10th week of pregnancy n I started to take 50mcg levothyroxine for low thyroid at 9th week, is it late to start the meds and would it effect the baby's development. pls help me out .... i would be relieved to hear from someone who had no thyroid at all earlier and started taking meds at 10+ week of pregnancy and what was the result at end and their experience or any specialized person in the field....i have heard and read negative things like it causes mental retardation,neurological impairment n lower IQ in babies during first trimester.I'm worried.... pls help