PLOD1 and ovarian hyperstimulation syndrome: The incidence of severe ovarian hyperstimulation syndrome (OHSS) was 1.98% (LH/FSH <2) and 2.68% (LH/FSH ≥ 2) in the agonist group respectively; however, it was 1.39% (LH/FSH < 2) and 0 (LH/FSH ≥ 2) in the mild-stimulation protocol group respectively, and there was no statistically significant difference in the comparison of the groups (Tables 1 and 2).