Myths vs facts: TSH Schilddrüse and Fruchtbarkeit

Thyroid function directly impacts fertility: TSH regulates metabolism, oocyte maturation, and implantation. A TSH above 2.5 mIU/L is considered subclinical hypothyroidism and is associated with increased miscarriage risk and longer time to pregnancy. Fact: Guidelines (ATA, ETA) recommend a TSH target below 2.5 mIU/L when trying to conceive, and below 2.0 mIU/L for assisted reproduction. Myth: Only TSH above 4.0 mIU/L matters – this is disproven. Even TSH between 2.5 and 4.0 can impair fertility. Myth: Every elevated TSH requires immediate levothyroxine – evidence for universal treatment in subclinical hypothyroidism without TPO antibodies is weaker. Fact: In TPO-antibody-positive women with TSH >2.5, risk rises significantly, and treatment improves pregnancy rates. Caveat: TSH alone is insufficient – fT3, fT4, TPO antibodies, and iodine status are also critical. MyBody-X does not offer thyroid diagnostics; any abnormalities should be evaluated by an endocrinologist.