Is BDNF useful for Fruchtbarkeit?

The provided knowledge contexts contain no information about BDNF (Brain-Derived Neurotrophic Factor) and its potential role in fertility. BDNF is a neurotrophin primarily known for neuronal survival and plasticity. Some research outside this context suggests BDNF may influence reproductive function, e.g., via the hypothalamic-pituitary-gonadal axis or oocyte maturation. However, the evidence is not yet sufficient to support clinical use of BDNF testing or supplementation for fertility. Direct-to-consumer DNA tests that include BDNF variants often overstate their clinical relevance. Without specific studies or guidelines in the given context, the utility remains unclear. Evidence is rated as 'unclear'. A cautious, evidence-based approach is recommended, and any claims should be discussed with a healthcare professional.