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

Myth: A fertility test (e.g., genetic or hormone test) can accurately tell you how sport affects your fertility. – Fact: Evidence is weak. Moderate exercise generally supports fertility (e.g., by improving insulin sensitivity), while excessive endurance training can impair it. However, no consumer test can reliably predict the individual effect of sport on fertility. Most genetic variants have small effects, and lifestyle factors dominate. Another myth: 'A genetic test can tell me if I have vitamin D or B12 deficiency, explaining my fertility issues.' In reality, deficiencies are best assessed via blood tests; genetic tests only indicate risk, not diagnosis. Sport is beneficial in moderation, but overtraining can disrupt menstrual cycles in women and reduce sperm quality in men. A fertility check should always be medically supervised and not rely solely on DTC tests.