I have had an enlarged thyroid and it is a condition called Hashimoto thyroid. I have been on a syntheroid for several years and it just keeps the hormone levels in the body at a normal rate. People who are diagnosed with Hashimoto thyroid, have an enlarged thyroid because the body gives a signal to the thyroid gland that it is not producing enough hormones, and these people are most susceptible to Hypothroid malfunction (is evident with weight gain, low moods, energy levels and metabolism). As such the syntheroid offsets this lack of hormone in the body that helps your metabolism and even mood.

I am in my 19th week, and have been on a syntheroid during my pregnancy. It is a very safe medication and usually will not cause any problems unless of course overdosed on. In fact the hormone is actually necessary for tbe body to function normally. It helps keep your weight in order, metabolism in order and even keeps away those mood swings! Not everyone is that lucky...

Hope this helps!

Good luck.