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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 days 10.82 ± 3.17 10.50 ± 2.57 0.72
Total FSH (IU/mL) 4744 ± 2109 4820 ± 1620 0.85
Max E2 (pmol/L) 2786 ± 2118 1200 ± 536 < 0.05
Follicles> 11 mm 4.00 ± 2.65 5.96 ± 2.68 < 0.05
Follicles≥16 mm 2.61 ± 1.44 4.04 ± 1.83 < 0.05
OPU 3.29 ± 2.15 6.46 ± 3.20 < 0.05
M2 oocytes 2.47 ± 1.65 5.59 ± 3.20 < 0.05
Fertilization rate 0.57 ± 0.36 0.66 ± 0.24 0.37
2PN embryos 1.78 ± 1.50 4.04 ± 2.74 < 0.05
Top quality embryos 0.91 ± 0.97 2.35 ± 1.66 < 0.05