TSH means Thyroid Stimulating Hormone
Acceptable levels during pregnancy are:
First trimester: 0.1-2.5 mIU/L
Second trimester: 0.2-3.0 mIU/L
Third trimester: 0.3-3.0 mIU/L
Bottom line. Your OB/GYN needs monthly lab work to see where you stand. You may develop over or under active thyroid during your pregnancy and they will prescribe Synthroid (Levothyroxine) to control underactive thyroid. Two drugs are approved by FDA for treating overactive thyroid —propylthioracil (PTU) and methimazole (Tapezole.) These tablets work by slowing down the production of thyroid hormone. They are usually given in three equal doses about 8 hours a part. Talk to your doctor!
TSH is for thyroid stimulating hormone. If the thyroid is not functioning properly it causes the body to pump out high levels of TSH to try to stimulate the thyroid gland to produce thyroid hormones so if TSH levels in the blood are high, it indicates that the thyroid is not functioning well. They will routinely check thyroid function in pregnant women.
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