CYP19A1 and endometriosis: As shown in Figure 1, we conducted time-course (2 h, 12 h, and 24 h) and dose-response (2.5 ng/mL, 25 ng/mL, and 50 ng/mL) experiments to determine the effect of Activin A on P450arom expression in ESCs from patients with endometriosis.