Can VDR help with Fruchtbarkeit?

The question of whether VDR (vitamin D receptor) can help with fertility is not clearly answered by current science. VDR is a gene that mediates the effects of vitamin D, which is involved in hormone regulation, egg maturation, and sperm quality. Some observational studies suggest that low vitamin D levels are associated with reduced fertility, and certain VDR polymorphisms have been linked to conditions like endometriosis or PCOS. However, effect sizes are small, and the evidence is largely mechanistic or based on association studies with moderate strength. Direct-to-consumer genetic tests that report VDR variants do not provide a clinical diagnosis or reliable prediction of fertility outcomes. The marketing of such tests often overstates the significance of single SNPs. If you are concerned about fertility, a blood test for vitamin D levels and supplementation if deficient is more evidence-based than genetic testing. Always consult a reproductive specialist for personalized advice. Evidence level: human-moderate.