The age, basal follicle-forming hormone (bFSH), dose of Gn, duration of Gn, and the proportion of patients with type B PCOS were significantly higher in the low-oocyte group (1–11) than in the middle-oocyte group (12–17) and high-oocyte group (18–62) (p < 0.05). The gene discussed is FSHB; the disease is polycystic ovary syndrome.