Table 1 Characteristics of the groups (values are means ± SD). No significant differences

Baseline characteristics

Age (y)

33.79 ± 3.95

34.19 ± 3.75

Duration infertility (y)

3.71 ± 2.08

3.87 ± 1,56

Cycle day 3

FSH (IU/l)

7.60 ± 2.46

7.38 ± 3.11

E2 (pmol/l)

126.05 ± 53.10

118.60 ± 47.06

Inhibin B (ng/l)

94.95 ± 39.36

96.33 ± 40.60

Total volume (ml)

10.91 ± 5.19

12.10 ± 4.69

Total antral follicle count

9.41 ± 5.00

10.66 ± 5.21

Treatment results

Duration of stimulation (d)

12.4 ± 2.7

11.9 ± 2.3

Number of ampoules of FSH

34.2 ± 8.0

32.7 ± 7.0

E2 level on the day of hCG (pmol/l)

11155.41 ± 18591.13

12134.78 ± 17872.12

Endpoints

Total number of follicles

14.27 ± 10.23

14.17 ± 10.27

Total number of oocytes

11.58 ± 8.51

11.93 ± 9.11