What to watch with Fertility Check and Schlaf?

Combining a Fertility Check and a Sleep (Schlaf) test from MyBody-X may seem insightful, but the evidence is limited. The Fertility Check typically looks at a few genes (e.g., FSH receptor, MTHFR) linked to reproductive health, but effect sizes are small and predictive value low. The Sleep test examines chronotype genes (CLOCK, PER), whose influence on sleep is polygenic and heavily modified by lifestyle. Together, they might suggest broad tendencies—like a slight preference for eveningness or a need for more folate—but cannot diagnose or guide treatment for infertility or sleep disorders. Evidence is mostly marketing/unclear; many associations are mechanistic or from GWAS without clinical validation. For real concerns, consult a fertility specialist or sleep physician rather than relying on consumer genetics.