{"count":4,"index":{"built_at":"2026-07-27T08:37:14.194199+00:00","public_records":55311,"revision":"29e81ca382b1140477bf6f97"},"query":{"area":null,"kind":null,"lang":null,"limit":10,"match_mode":"all_terms","q":"Evidence check: tTG IgA in the context of Fruchtbarkeit"},"results":[{"answer":"tTG IgA (tissue transglutaminase IgA) is the primary serological marker for celiac disease. Untreated celiac disease can impair fertility through malabsorption, chronic inflammation, and autoimmunity—affecting both women (menstrual irregularities, recurrent miscarriage) and men (reduced sperm quality). Evidence comes from observational studies and clinical guidelines, not randomized controlled trials, so the evidence level is human-moderate. A positive tTG IgA test alone is not a fertility test but indicates possible celiac disease, which should be confirmed by duodenal biopsy. In IgA deficiency, IgG-based tests are needed. Some guidelines recommend testing in unexplained infertility, but universal screening is not standard. Importantly, the test is specific, but not every positive result leads to fertility issues. A gluten-free diet can improve fertility in confirmed celiac disease. The utility of direct-to-consumer tests (e.g., MyBody-X) for tTG IgA is limited because they often lack medical interpretation. Overall, the test is useful but should be part of a comprehensive fertility workup.","area":"gesundheit","canonical_id":"gesundheit:canonical-cc9642b41bcb9c9b327a1513","id":"public-1b244236540dc4da4243876c","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: tTG IgA in the context of Fruchtbarkeit","score":31.20170564,"snippet":"tTG IgA (tissue transglutaminase IgA) is the primary serological marker for celiac disease. Untreated celiac disease can impair fertility through malabsorption, chronic inflammation, and autoimmunity—affecting both women (menstrual irregularities, recurrent miscarriage) and men (reduced sperm quality). Evidence comes from observational studies and clinical guidelines, not randomized controlled trials, so the evidence level is human-moderate. A positive tTG IgA test alone is not a fertility test but indicates possible celiac disease, which should be confirmed by duodenal biopsy. In IgA deficiency, IgG-based tests are needed. Some guidelines recommend testing in unexplained infertility, but un","sources":[],"title":"Evidence check: tTG IgA in the context of Fruchtbarkeit","url":"https://tikki.wiki/wissen/gesundheit/frage/public-1b244236540dc4da4243876c/evidence-check-ttg-iga-in-the-context-of-fruchtbarkeit/","verification":{"claim_support_verified":false,"human_reviewed":false,"quote_exact_match":false,"source_identity_verified":false,"tier":"existing_native_answer_privacy_screened_sources_pending"}},{"answer":"HLA-DQ2 is a genetic risk factor for celiac disease, an autoimmune condition that, if untreated, can impair fertility through malabsorption, inflammation, or hormonal imbalances. However, most HLA-DQ2 carriers never develop celiac disease; penetrance is low. Direct evidence linking HLA-DQ2 alone to fertility outcomes in the absence of celiac disease is lacking. Studies indicate that unexplained infertility and recurrent miscarriage are more common in women with active celiac disease, but the genotype alone has no predictive value for fertility. Genetic testing cannot replace clinical evaluation. If celiac disease is suspected, serology (tTG-IgA) and duodenal biopsy are required. The evidence for an HLA-DQ2–fertility link is moderate, based on association studies rather than causal genetics. MyBody-X tests do not provide clinically validated fertility predictions. Caution: a positive result does not indicate current or future fertility problems.","area":"gesundheit","canonical_id":"gesundheit:canonical-365ab103df82946e582b379c","id":"public-bcd746b484bf3f74780e2aa2","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: HLA-DQ2 in the context of Fruchtbarkeit","score":27.65892373,"snippet":"HLA-DQ2 is a genetic risk factor for celiac disease, an autoimmune condition that, if untreated, can impair fertility through malabsorption, inflammation, or hormonal imbalances. However, most HLA-DQ2 carriers never develop celiac disease; penetrance is low. Direct evidence linking HLA-DQ2 alone to fertility outcomes in the absence of celiac disease is lacking. Studies indicate that unexplained infertility and recurrent miscarriage are more common in women with active celiac disease, but the genotype alone has no predictive value for fertility. Genetic testing cannot replace clinical evaluation. If celiac disease is suspected, serology (tTG-IgA) and duodenal biopsy are required. The evidence","sources":[],"title":"Evidence check: HLA-DQ2 in the context of Fruchtbarkeit","url":"https://tikki.wiki/wissen/gesundheit/frage/public-bcd746b484bf3f74780e2aa2/evidence-check-hla-dq2-in-the-context-of-fruchtbarkeit/","verification":{"claim_support_verified":false,"human_reviewed":false,"quote_exact_match":false,"source_identity_verified":false,"tier":"existing_native_answer_privacy_screened_sources_pending"}},{"answer":"A celiac genetic test (HLA-DQ2/DQ8) can indicate an increased risk for celiac disease, but it is not a standalone diagnostic test. Untreated celiac disease is associated with fertility issues due to chronic inflammation and nutrient malabsorption (iron, folate, vitamin D). However, the genetic test alone does not confirm active disease; serology (tTG-IgA) and duodenal biopsy are required. Many individuals with risk genotypes never develop celiac. In the fertility context, the test is only a preliminary clue, not a basis for clinical decisions. The evidence for direct benefit of genetic testing in unexplained infertility is mixed. Recommendation: If celiac is suspected (e.g., gastrointestinal symptoms, unexplained iron deficiency), pursue standard diagnostic workup. A DNA test alone is insufficient. Safety note: Do not start a gluten-free diet without confirmed diagnosis, as it can mask symptoms and delay proper testing.","area":"gesundheit","canonical_id":"gesundheit:canonical-cda7a34df1784631cdb265f1","id":"public-cf6d922b40de0502a28f25fa","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: Zöliakie Test in the context of Fruchtbarkeit","score":27.62459203,"snippet":"A celiac genetic test (HLA-DQ2/DQ8) can indicate an increased risk for celiac disease, but it is not a standalone diagnostic test. Untreated celiac disease is associated with fertility issues due to chronic inflammation and nutrient malabsorption (iron, folate, vitamin D). However, the genetic test alone does not confirm active disease; serology (tTG-IgA) and duodenal biopsy are required. Many individuals with risk genotypes never develop celiac. In the fertility context, the test is only a preliminary clue, not a basis for clinical decisions. The evidence for direct benefit of genetic testing in unexplained infertility is mixed. Recommendation: If celiac is suspected (e.g., gastrointestinal","sources":[],"title":"Evidence check: Zöliakie Test in the context of Fruchtbarkeit","url":"https://tikki.wiki/wissen/gesundheit/frage/public-cf6d922b40de0502a28f25fa/evidence-check-zoeliakie-test-in-the-context-of-fruchtbarkeit/","verification":{"claim_support_verified":false,"human_reviewed":false,"quote_exact_match":false,"source_identity_verified":false,"tier":"existing_native_answer_privacy_screened_sources_pending"}},{"answer":"The question of myths vs. facts regarding fertility tests and allergies is not directly addressed in the provided context. Fertility tests such as the Hormon & VitalCheck for Men measure markers like testosterone, LH, FSH, or prolactin – they are not designed to diagnose allergies. Allergies are immune responses to environmental substances, while fertility primarily involves hormonal, genetic, and anatomical factors. A common myth is that allergies directly impair fertility; there is no strong evidence for this. However, certain autoimmune conditions (e.g., celiac disease, mentioned in the context as a celiac test) can cause both allergy-like symptoms and fertility issues. The celiac test detects anti-tTG IgA antibodies and can indicate gluten intolerance, which untreated may affect fertility. Still, this is not a direct link between general allergies and fertility tests. The evidence for a connection between common allergies and fertility is weak, mostly based on mechanistic or population studies. Consumer fertility tests provide only a snapshot and should not replace medical diagnosis. Conclusion: There is no substantiated myth that a fertility test reveals allergies or vice versa. The tests serve different purposes. When in doubt, consult a healthcare professional.","area":"gesundheit","canonical_id":"gesundheit:canonical-241831fd9cc38a6195e31e49","id":"public-9f3767bf7cacce42ce6250a7","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Myths vs facts: Fertility Check | Fruchtbarkeits-Test and allergy","score":25.55615797,"snippet":"The question of myths vs. facts regarding fertility tests and allergies is not directly addressed in the provided context. Fertility tests such as the Hormon & VitalCheck for Men measure markers like testosterone, LH, FSH, or prolactin – they are not designed to diagnose allergies. Allergies are immune responses to environmental substances, while fertility primarily involves hormonal, genetic, and anatomical factors. A common myth is that allergies directly impair fertility; there is no strong evidence for this. However, certain autoimmune conditions (e.g., celiac disease, mentioned in the context as a celiac test) can cause both allergy-like symptoms and fertility issues. The celiac test de","sources":[],"title":"Myths vs facts: Fertility Check | Fruchtbarkeits-Test and allergy","url":"https://tikki.wiki/wissen/gesundheit/frage/public-9f3767bf7cacce42ce6250a7/myths-vs-facts-fertility-check-fruchtbarkeits-test-and-allergy/","verification":{"claim_support_verified":false,"human_reviewed":false,"quote_exact_match":false,"source_identity_verified":false,"tier":"existing_native_answer_privacy_screened_sources_pending"}}],"schema_version":"tikki.search-response.v1"}