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Table 2 Hormonal dynamics: follicular phase levels of serum estradiol, progesterone, and LH

From: Hormonal, follicular and endometrial dynamics in letrozole-treated versus natural cycles in patients undergoing controlled ovarian stimulation

  Estradiol (pmol/mL) Progesterone (pmol/mL) LH (IU/L)
  Group I (Natural cycle) Group II letrozole 2.5 mg Group III (letrozole 5 mg) Group I (Natural cycle) Group II (letrozole 2.5 mg Group III (letrozole 5 mg) Group I (Natural cycle) Group II (letrozole 2.5 mg Group III (letrozole 5 mg)
D3 139.8 ± 66.36 154.22 ± 131.31 126.71 ± 46.75 2.35 ± 0.84 2.57 ±.90 2.55 ±.89 5.18 ± 2.25 5.22 ± 3.41 5.28 ± 2.71
D7 257.75 ± 187.8 196.60 ± 127.07 147.63 ± 69.74 2.08 ± 0.40 2.37 ± 0.87 2.80 ± 0.82 5.1 ± 1.34 6.71 ± 4.23 8.28 ± 4.07
D 9-11 380.48 ± 238.78 810.05 ± 178.26 562.53 ± 137.51 2.35 ± 0.85 2.2 ± 0.79 2.67 ± 0.47 5.89 ± 2.96 5.76 ± 3.30 6.65 ± 2.95
D hCG 911.48 ± 941.96 1275.41 ± 927.66 1066.16 ± 1876.37 2.46 ± 1.32 2.40 ± 0.89 2.75 ± 0.75 17.39 ± 16.09 8.92 ± 9.86 10.50 ± 13.81
E2/follicle ≥ 16 mm 593.12 ± 577.4 584.41 ± 1147.84 389.8 ± 849.79       
  1. P value: 0.025: day7 for serum Estradiol between group I and III.
  2. P value: 0.041 day of hCG For serum Estradiol between group I and III.
  3. P value: 0.000 LH at day of HCG group I vs II