BRD2 and spontaneous abortion: Multivariate logistic regression analysis showed female age (OR 1.050; 95% CI 1.032–1.069; P < 0.001), male age (OR 1.100; 95% CI 1.086–1.115; P < 0.001), basic FSH (OR 1.049; 95% CI 1.022–1.076; P < 0.001), anti-Mulller hormones (OR 0.893; 95% CI 0.862–0.925; P < 0.001) and number of fetuses at pregnancy diagnosis were independent predictors of spontaneous abortion (Table 2).