Can HLA-DQ2 help with fertility?

HLA-DQ2 is a genetic risk factor for celiac disease, not a direct fertility marker. Untreated celiac disease can impair fertility through nutrient malabsorption and systemic inflammation, potentially causing menstrual irregularities, recurrent miscarriage, or reduced sperm quality. However, detecting HLA-DQ2 alone does not diagnose celiac disease or fertility issues. Most HLA-DQ2 carriers never develop celiac disease; confirmation requires positive serology (tTG-IgA) and duodenal biopsy. A consumer DNA test for HLA-DQ2 is not a fertility test. If you have unexplained infertility or recurrent pregnancy loss, screening for celiac disease may be warranted, but the focus should be on clinical evaluation. Evidence linking celiac disease to fertility is human-observational, while HLA-DQ2's role is mechanistic and indirect. Bottom line: HLA-DQ2 does not help fertility; it merely indicates a risk for a treatable autoimmune condition that, if active, might affect reproductive health.