How often should TSH be checked during the first trimester of pregnancy?

Checking TSH, or Thyroid-Stimulating Hormone, levels during the first trimester of pregnancy is important for monitoring thyroid function, as both hyperthyroidism and hypothyroidism can adversely affect the health of both the mother and the developing fetus. During this critical period, fluctuations in thyroid hormone levels can occur, making regular monitoring essential.

Every four weeks is recommended for checking TSH levels during the first trimester to ensure that any changes can be detected and addressed promptly. This frequency helps to manage any potential thyroid issues effectively, as adjustments to medication may be necessary based on the results. Monitoring every month provides a balance between ensuring necessary oversight of thyroid function while also avoiding too frequent testing that could lead to unnecessary anxiety or healthcare visits.