How are Fitness | LifestyleCheck and fertility related?

The relationship between fitness/lifestyle genetic tests and fertility is not well-supported by evidence. While some genes (e.g., FTO, TCF7L2) influence metabolism and weight, there is no robust data linking these directly to fertility outcomes. A large meta-analysis (BMJ 2016, n=9563) found that FTO genotype does not predict differential diet response, undermining claims of personalized nutrition for fertility. Fertility is multifactorial, involving hormones, age, and environment. DNA tests cannot replace clinical assessment. Evidence level: marketing/unclear. Caution: do not rely on such tests for fertility decisions; consult a healthcare provider.