What role does TSH play in Fruchtbarkeit?

The provided context does not contain information on the role of TSH (thyroid-stimulating hormone) in fertility. From established medical knowledge, TSH is a key regulator of thyroid function. Abnormal TSH levels (typical reference 0.5–4.0 mU/L, often narrower for conception) indicate hypo- or hyperthyroidism. Both conditions are linked to fertility issues: hypothyroidism can cause anovulation, menstrual irregularities, and increased miscarriage risk; hyperthyroidism can disrupt ovulation and cycle regularity. Evidence is human-strong, supported by extensive clinical studies and guidelines. TSH testing is standard in fertility workups. Consumer DNA tests that include TSH-related variants (e.g., in PDE8B, TSHR) have limited predictive value and cannot replace direct serum TSH measurement. The provided context lacks such markers. Any abnormalities require medical evaluation.