How are Fertility Check | Fruchtbarkeits-Test and fatigue related?

The provided context does not contain direct evidence linking a Fertility Check (Fruchtbarkeits-Test) to fatigue. Fertility tests typically assess hormones like AMH, FSH, LH, or genetic markers associated with reproductive health. Fatigue can be indirectly related to hormonal imbalances (e.g., thyroid function, prolactin) or nutrient deficiencies (iron, vitamin D, B12) that also affect fertility. The DNA snippets given (FTO, LCT, PPARA, rs10830963, FUT2) are not specific to a fertility check. Therefore, the evidence for a direct connection between fertility DNA tests and fatigue is unclear. Consumers should not rely solely on such tests to explain fatigue and should seek medical evaluation. The evidence level is based on general medical knowledge, not the provided sources.