How are TSH Schilddrüse and Fruchtbarkeit related?

TSH (thyroid-stimulating hormone) and fertility are closely linked. TSH regulates thyroid hormone production, which is critical for ovulation, egg maturation, and endometrial health. Both hyperthyroidism (low TSH) and hypothyroidism (high TSH) can disrupt menstrual cycles, cause anovulation, and impair fertility. Evidence shows that even subclinical TSH elevations (>2.5 mU/l) can reduce conception rates. Clinical guidelines often recommend a TSH target below 2.5 mU/l for women trying to conceive. The evidence is human-strong, supported by large cohort studies and endocrine society recommendations. Caveat: TSH is one piece of the puzzle; other factors like age, ovarian reserve, and male fertility also matter. Thyroid assessment should be part of routine fertility workup.