All of these hormone levels can be tested, with the easiest screening test being TSH,
as high levels of thyroid hormone tell the brain to produce less TSH, and low levels tell the brain to produce more.
In this study, researchers measured the hormones of 5153 women during early pregnancy (before the 18th week) and found that women
with high levels of thyroid hormone but low levels of hCG were between three and eleven times more likely to develop preeclampsia.
Women with
high levels of thyroid hormone and high levels of hCG were not at increased risk of preeclampsia.
The high levels of thyroid hormone can have adverse effects on other organ systems.
The high levels of the thyroid hormone in the blood stream can cause the thickening of heart muscle.
The high levels of thyroid hormones can cause the development of heart disease, and these patients may have a heart murmur, difficulty breathing, high heart rate and arrhythmias.