APOC3 and polycystic ovary syndrome: To exclude the influence of different types of follicles, we also analyzed the average optical density of ApoC3 in different stages of follicles, and found that ApoC3 was obviously highly expressed in oocytes in primary follicles (PmF), secondary follicles (SF) and graafian follicles (GF) of PCOS mice (P<0.05, Fig. 6).