Variable  Letrozole groups Mean ± SD  Letrozole total cycle
Follicular development (mm)  20.3 ± 1.89  113
Serum E2 one day of HCG (pg/mL)  120 ± 15.5  113
Pregnancy/cycles  27 (23.89%)  113
Pregnancy/total patients  27 (61.36%)  113