Strengths and limitations
The main strength of the study is that we focused on the relationship between ANGPTL4 and PCOS and linked them together for the first time, and the ANGPTL4 expression in ovarian GCs might be a risk factor for the occurrence and development of PCOS by taking part in glucose and lipid metabolism. This has not been confirmed before. But it also had limitations, small sample size and retrospective study design made it essential to take further large sample and basic experimental research to investigate the pathogenesis of ANGPTL4 in PCOS.