Question: I had my first child (a boy) about 5 year ago. I became pregnant very easily (fertility was definitely NOT a problem) and the pregnancy was quite normal and everything went according to plan.
Four years later, my husband and I started trying to conceive again. After trying for about a year, I finally went to my OB GYN. She ordered some tests and everything came back pretty good, except for my TSH levels. My TSH levels were a little over 7.0 (if I remember correctly). Since my T3 and T4 levels are perfectly normal, my OB GYN doesn’t think that this is the cause of my infertility.
But, I have heard the normal range is below 2.0 (depending on who you ask it seems) and I am worried that this is affecting my fertility. Do my high TSH levels affect fertility?
Answer: Personally, I believe that this is your smoking gun. Your TSH levels should be anywhere from 1.0 mIU/L to 2.0 mIU/L. Anything higher is an indicator of problems (and could be the cause of your fertility issues), even if your T3 and T4 numbers are within a normal range.
Our bodies are designed for self-preservation FIRST and reproduction SECOND. The reason why so many people fail to conceive is because our bodies are not in the condition necessary to carry a child. This is your case. The good new, however, is that high TSH levels are easy to fix.
A recent study showed (I will post a reference to this when I find the article) that high TSH levels dramitically decrease the chances for conception, even when T4 and T4 levels were considered “normal”… and also showed that supplementing with synthetic thyroid hormones both decreased TSH and increased fertility.
My honest opinion? Get a second opinion from a good Endocrinologist. Your OB GYN might be the best at what she does, but she is probably no expert on the inner workings of the thyroid and the associated hormonal balance necessary for fertility. Take care of yourself first and fertility will follow.