The Thyroid and Estrogen Connection | Dr. Naomi Ha, ND The thyroid gland is the master regulator of all metabolic processes in the body and plays a vital role in promoting healthy hormone production. For women in particular, hypothyroidism (underfunctioning thyroid gland producing lower levels of thyroid hormone) can impact the body’s estrogen, testosterone and progesterone balance, contributing to infertility, fatigue, weight gain and premenstrual symptoms. When patients present to the clinic seeking naturopathic care for any of the above listed concerns, they are recommended to complete a comprehensive blood work panel to assess thyroid function. These tests include: Thyroid stimulating hormone (TSH) Free-T3 (triiodothyronine, active thyroid hormone) Free-T4 [...]