PLOD1 and polycystic ovary syndrome: In this study, compared with non-PCOS patients, PCOS patients were younger, and had higher BMI, shorter infertile duration, higher levels of basal LH and T, longer duration of Gn administration, lower Gn dosage, more numbers of retrieved oocytes and available embryos, and higher pregnancy rate; but there were no significant differences in abortion rate and ectopic pregnancy rate between non-PCOS patients and PCOS patients.