Is STI Test useful for fertility?

The question of whether an STI test is useful for fertility is not addressed in the provided context. From general medical knowledge, untreated sexually transmitted infections (STIs) such as chlamydia and gonorrhea can cause pelvic inflammatory disease, tubal damage, and subsequent infertility. Therefore, STI testing is recommended for individuals with fertility concerns or unexplained infertility. However, the provided knowledge focuses on DNA tests, nutrigenetics, and biomarkers – not STI diagnostics. The evidence for STI testing in fertility is well-established in clinical guidelines, but since it falls outside the given context, the evidence grade here is marked as 'unclear'. Direct-to-consumer STI tests may have limitations in sensitivity and specificity; confirmatory clinical testing is advised.