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Table 1 Characteristics of the IVF cycles for patients co-treated with letrozole compared to the control group

From: Does daily co-administration of letrozole and gonadotropins during ovarian stimulation improve IVF outcome?

  Control group Letrozole P
N 87 87  
Age (years) 37.0 ± 3.8 36.5 ± 4.1 NS
Length of stimulation (days) 11.1 ± 2.1 10.2 ± 1.7 <0.01
Total dose of gonadotropins (IU) 3012 ± 1115 3316 ± 1037 NS
Follicles >15 mm at the trigger day 7.9 ± 5.3 10 ± 5.8 0.02
E2(pmol/L) 6760 ± 4792 2420 ± 1923 <0.01