Fig. 2

The embryo quality of different total Gn dosage groups with AMH stratification. A1, B1, C1: female age < 35 years; A2, B2, C2: female aged 35–42 years. AMH anti-Müllerian hormone, Gn gonadotropin. Group A: < 1875 IU, Group B: 1875–3750 IU, Group C: ≥ 3750 IU. *P < 0.05, **P < 0.01, ***P < 0.001