Myths vs facts: Fertility Check and sleep

Myths vs facts: Fertility Check and sleep. Many direct-to-consumer DNA tests claim to predict fertility potential via genetic markers. Fact: Most fertility-related SNPs have tiny effect sizes and lack clinical validation. A DNA-based fertility check cannot replace standard medical workup (hormone panels, semen analysis, cycle tracking). Sleep, however, has well-documented effects on fertility: chronic sleep deprivation disrupts the hypothalamic-pituitary-gonadal axis, alters cortisol and melatonin rhythms, and impairs oocyte and sperm quality. Studies link poor sleep to menstrual irregularities and reduced conception rates. Myth: 'A genetic test can tell me exactly when I will conceive' – false. 'Sleep doesn't matter for fertility' – false. Fact: Lifestyle factors (sleep, diet, stress) are dominant; genetic tests provide only weak, non-diagnostic hints. Evidence grade: marketing/unclear. Caveat: Do not use DNA fertility tests for clinical decisions; consult a reproductive specialist.