PLOD1 and Infertility: In model 1, after adjusting for age, BMI, duration of infertility, type of infertility, basal FSH level, basal LH level, antral follicle count, and infertility indicators, women who underwent fixed GnRH-ant protocol had a similar CLBR compared with those receiving flexible GnRH-ant protocol (HR= 0.85; 95% CI: 0.53-1.38; P=0.518).