Is FOXO3 useful for fertility?

FOXO3 is a transcription factor linked to longevity and cellular stress resistance. Some studies suggest a possible role in ovarian aging, but the evidence is weak and not clinically actionable for fertility. Fertility depends on many factors—age, hormones, lifestyle. A single gene like FOXO3 has no diagnostic or predictive value. Research is mostly mechanistic, from animal models or small cohorts. Consumers should not rely on such markers for fertility decisions. Medical consultation and comprehensive testing are more appropriate.