Among the women who delivered within two weeks of amniocentesis, 50% (12/24) had intra-amniotic inflammation, indicated by an elevated AF concentration of IL-6 (IL-6 ≥ 2.6 ng/mL) compared to 7.6% (5/66) of those who delivered more than two weeks after an amniocentesis. The gene discussed is IL6; the disease is atrial fibrillation.