Thyroid function tests are blood tests that check the levels of the hormones (chemicals) made by the thyroid gland. Some thyroid function tests also check the level of a hormone made by the pituitary gland in the brain, which acts on the thyroid gland.hyroid function tests are blood tests that check the levels of the hormones (chemicals) made by the thyroid gland. Some thyroid function tests also check the level of a hormone made by the pituitary gland in the brain, which acts on the thyroid gland.
Yes, high intakes of some forms of vitamin A can be harmful. Getting too much preformed vitamin A (usually from supplements or certain medicines) can cause dizziness, nausea, headaches, coma, and even death. High intakes of preformed vitamin A in pregnant women can also cause birth defects in their babies.
Eating a healthy diet is always a wise idea -- especially during pregnancy. It's also a good idea during pregnancy to take a prenatal vitamin to help cover any nutritional gaps in the mother's diet.Prenatal vitamins contain many vitamins and minerals. Their folic acid, iron, iodine, and calcium are especially important.t's also a good idea during pregnancy to take a prenatal vitamin to help cover any nutritional gaps in the mother's diet. Prenatal vitamins contain many vitamins and minerals.