
Main cause of underactive thyroid is low levels of thyroid hormone in the blood. These condition arises when production of thyroid hormones become less. It can also happen due problem in pituitary gland, but it is exceptional. Pituitary gland present in brain and it controls function of thyroid gland. Common underactive symptoms are slowing down of heart beat, weakness, and so on.
Underactive thyroid symptoms in women are quite different in every individual case. Fro women, Thyroid tend to manifest themselves in weight gain. They also face problem in carrying fetus to full term and it resulting in miscarriages. Underactive thyroid Symptom in women is more commonly found after an age of fifty years. But this is not true that younger women do not have this problem.
In many cases women can suffer from thyroid problems for years before being fully diagnosed and even after treatment from doctor, they may not getting best advice. In initial stage there are hardly any symptoms and signs for underactive thyroid.