About Fertility
Why Measure Thyroid Stimulating Hormone (TSH)

The thyroid gland, a butterfly-shaped endocrine organ located at the base of the neck, plays a vital role in regulating metabolism, hormone balance, and reproductive health. Thyroid disorders are a common concern, affecting over 6% of reproductive-age women, and are 5 to 8 times more prevalent in women than men. The most effective way to assess thyroid function is by measuring Thyroid Stimulating Hormone (TSH) levels in the blood. TSH is produced by the pituitary gland at the base of the brain and signals the thyroid to produce essential thyroid hormones.
Why Measure Thyroid Stimulating Hormone (TSH)?
Hypothyroidism, or an underactive thyroid, occurs when the gland does not respond efficiently to TSH stimulation, resulting in elevated TSH levels. High TSH can also increase prolactin production, which may further disrupt reproductive function. Conversely, hyperthyroidism, or an overactive thyroid, leads to low TSH levels, which can also negatively impact fertility.
Most clinical laboratories define the normal TSH range as 0.4 to 4.5 mIU/L. Keeping TSH levels optimized can improve fertility outcomes and lower risks during pregnancy.
TSH Levels and Pregnancy: Why It Matters
During pregnancy, maternal thyroid hormone production increases by 20% to 40%, supporting fetal development. Maintaining normal thyroid function before and during pregnancy helps reduce the risks of implantation failure, miscarriage, preterm labor, and developmental issues in newborns and young children.
Optimize Your Thyroid Health for Better Fertility
If you are trying to conceive or experiencing pregnancy challenges, monitoring and managing TSH levels can be a crucial step in improving reproductive health. Consult a specialist to ensure your thyroid is functioning optimally for a successful pregnancy.
For more information or to schedule a consultation, contact us today.