As shown in Table 2, the embryonic absorption rate of the PCOS group was significantly higher than that of the control group (χ2 = 5.330, p < 0.05), while that of the APN + PCOS group was significantly lower than that of the PCOS group (χ2 = 4.623, p < 0.05). Here, ANPEP is linked to polycystic ovary syndrome.