How are BDNF and fertility related?

BDNF (Brain-Derived Neurotrophic Factor) is best known for its role in neuroplasticity, but it is also expressed in reproductive tissues. Evidence suggests BDNF influences oocyte maturation, embryo implantation, and sperm function. Low BDNF levels have been linked to conditions like endometriosis and PCOS, which impair fertility. However, the evidence is moderate: most findings come from animal or in vitro studies, and human data are inconsistent. Genetic tests for BDNF variants are not clinically validated for fertility prediction. Fertility is multifactorial – hormones, age, lifestyle, and overall health play larger roles. While BDNF may be a piece of the puzzle, it is not a standalone marker. Anyone concerned about fertility should consult a reproductive specialist rather than rely on consumer genetic tests.