Table 1 Comparison of clinical parameters in patients stratified in two groups according to stimulation protocol (letrozole plus HMG or HMG-only)

N

80

45

/

Age (years)

34.5 (31–37) [24–40]

34 (31.5–36.5) [27–40]

0.959

Male factor infertility (%)

53.7

55.5

0.84

Endometriosis (%)

5

4.4

0.88

Tubal factor (%)

6

4

0.63

BMI (kg/cm²)

21,9 (20–25) [16–31.5]

23 (20–24) [18–29]

0.736

Basal FSH (mIU/ml)

6.4 (5.3–7.4) [2–12]

6.4 (5.5–7.2) [4.5–9]

0.795

Basal LH (mIU/ml)

5.2 (4.15–6.7) [0.88–11]

4.7 (3.8–6.9) [2.55–11]

0.402

Basal E2 (pg/ml)

42.7 (30.2–59.9) [13–238]

43 (36–51) [13–91]

0.977

Antral follicle count (n)

12 (10–16) [7–27]

12 (10–14) [9–20]

0.316

AMH (ng/ml)

3.5 (2.4–4.9) [1.16–12.3]

4 (2.5–6.7) [1.2–10]

0.222