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Table 1 IVF outcomes of gonadotropins only and letrozole- gonadotropins cycles

From: Does daily co administration of gonadotropins and letrozole during the ovarian stimulation improve IVF outcome for poor and sub optimal responders?

 Poor + sub-optimal responders (N = 24)
 Letrozole (−)Letrozole (+)p
Stimulation days10.82 ± 3.1710.50 ± 2.570.72
Total FSH (IU/mL)4744 ± 21094820 ± 16200.85
Max E2 (pmol/L)2786 ± 21181200 ± 536< 0.05
Follicles> 11 mm4.00 ± 2.655.96 ± 2.68< 0.05
Follicles≥16 mm2.61 ± 1.444.04 ± 1.83< 0.05
OPU3.29 ± 2.156.46 ± 3.20< 0.05
M2 oocytes2.47 ± 1.655.59 ± 3.20< 0.05
Fertilization rate0.57 ± 0.360.66 ± 0.240.37
2PN embryos1.78 ± 1.504.04 ± 2.74< 0.05
Top quality embryos0.91 ± 0.972.35 ± 1.66< 0.05