Patients were stratified according to basal FSH and E2 : FSH < 10 mIU/mL and E2 < 40 pg/mL ( group 1A ) , FSH < 10 mIU/mL and E240 pg/mL ( group 1B ) , FSH , 10-15 mIU/mL and E2 < 40 pg/mL ( group 2A ) , and FSH , 10-15 mIU/mL and E240 pg/mL ( group 2B ) .