A stalled prepregnancy decidual reaction (PLA2G2A/DIO2 < 25th percentile) was associated with increased miscarriage risk and decreased likelihood of a live birth in a future conception cycle [odd ratio (OR), 0.52; 95% confidence interval (CI), 0.29 to 0.92, P = 0.02] (Fig. 4E, left). The gene discussed is PLA2G2A; the disease is spontaneous abortion.