Myths vs facts: Fertility Check | Fruchtbarkeits-Test and Schlaf

The myth that a single fertility home test (e.g., measuring hormones from saliva or blood) can reliably assess fertility is not supported by evidence. Such tests typically measure one hormone (e.g., AMH, FSH) at a single time point, ignoring cycle-dependent variability and individual factors like age, stress, and sleep quality. The evidence for their predictive power is weak to moderate – they may offer rough hints but cannot diagnose. The link between sleep and fertility is also complex: sleep deprivation can affect hormones like melatonin, cortisol, and LH/FSH, but a single test (e.g., for melatonin) does not replace a medical workup. Fact: Comprehensive fertility evaluation requires a physician, including history, ultrasound, and repeated hormone measurements. Consumer tests should be seen as supplementary information, not a basis for decisions.