The hormones of the thyroid gland naturally also have an influence on the hormones of the cycle. This is why an untreated thyroid disorder can affect your cycle and, for example, cause you not to ovulate. 

So, if you are not ovulating due to a thyroid disorder, trackle can’t evaluate your data

However, if you are on a well-adjusted course of thyroid medication, the effects on your cycles should be manageable. Please talk to your doctor to find out if you can use trackle in your individual case.