Can IgG Unverträglichkeitstest help with fertility?

IgG food intolerance tests are often marketed to improve fertility, but there is no robust scientific evidence supporting their use for this purpose. Major allergy and immunology societies (e.g., EAACI, AAAAI) explicitly advise against IgG testing for diagnosing food intolerances, as IgG antibodies reflect exposure, not intolerance. For fertility, no well-controlled trials show that IgG-guided elimination diets enhance conception rates. While undiagnosed celiac disease (IgA-based) can impair fertility, IgG tests are not validated for this. The evidence level is weak and largely driven by commercial interests. Couples trying to conceive should focus on evidence-based fertility assessments (e.g., hormonal, semen analysis, celiac screening) and a balanced diet rather than unproven IgG tests.