I (F 39) am pregnant (3 wks, 5 days) and today I was prescribed 12.5 micro grams of Levothyroxine by my new endocrinologist. My blood results of TSH, fT3 and fT4 are normal:
TSH: 2.78 [Ref range 0.27 - 4.2]
fT3: 4.06 [Ref range 3.1 - 6.8]
fT4: 14.92 [Ref range 12 - 22]
The endocrinologist told me the medication is not for me but 'for the baby'. I don't have a history of hypothyroidism, I did have 2 thyroid nodules (under 1 cm) earlier this year but they both have disappeared by now.
During the appointment, I mentioned I have problems swallowing (due to my multiple sclerosis) and that I have been fatigued.
Not sure, if it's related to the prenatal supplement but while taking prenatal iodine early this year, my TSH level rose over the limit (5.1 mIU/L [Ref range 0.27-4.2]) a couple of times. Thankfully it came back two-three months later after discontinuing. This particular endocrinologist wasn't however aware of my TSH fluctuation.
I'd like to ask if it's a normal practice to prescribe Levothyroxine in pregnancy and what the reasons could be behind my prescription.
Thank you very much for any ideas and comments!