Myths vs facts: Pharmakogenetik Medicheck and fertility

Pharmacogenetics (PGx) examines how genetic variants affect drug metabolism and response. A PGx Medicheck can offer clues about optimal dosing or drug choice, including in fertility treatment. However, the direct link between PGx and fertility is often overstated. **Myth:** A PGx test can predict whether you are fertile or not. **Fact:** PGx tests analyze genes like CYP2D6, CYP3A4/5, or CYP2C19, which metabolize hormones used in fertility treatments (e.g., clomiphene, estrogens). Altered enzyme activity may influence efficacy or side effects, but it is not a fertility marker. **Myth:** The test replaces a full gynecological or andrological workup. **Fact:** PGx only addresses individual drug response. Fertility depends on many factors (hormonal status, egg/sperm quality, age, lifestyle). Evidence for PGx in fertility medicine is mostly mechanistic or from small studies; large clinical trials are lacking. **Bottom line:** A PGx Medicheck can assist in tailoring hormone therapy, but it does not substitute comprehensive fertility diagnostics. Its predictive power is limited, and results should be discussed with a specialist.