Table 1 Demographic and clinical characteristics of the study groups

Age (years)

Mean + SE

32.6 ± 2.3

36.6 ± 5.8

ns

Median (range)

33 (30–36)

38 (27–41)

Parity

Mean + SE

0.8 ± 1.3

0.6 ± 0.5

ns

Median (range)

0 (1–3)

1 (0–1)

BMI (Kg/m²)

Mean + SE

24.2 ± 5.7

24.5 ± 5.6

ns

Median (range)

24.9 (16.6-32.4)

22.5 (19.7-34.7)

Cause of infertility:

ns

PCO (%)

1(20)

1 (20)

Mechanical (%)

1(20)

0 (0)

Male factor (%)

2(40)

3 (60)

Unexplained (%)

1(20)

1 (20)

Serum estradiol level on day of hCG administration (pmol/L)

Mean + SE

9292 ± 2464

4167 ± 2730

<0.02

Median (range)

9336 (6589–11908)

3645 (1153–8575)

Number of oocytes retrieved

Mean + SE

15.8 ± 2.3

7.8 ± 3.9

<0.002

Median (range)

16 (12–18)

9 (2–12)

IL-2 mRNA levels

Mean + SE

2.449 ± 0.255

1.043 ± 0.146

<0.01

Median (range)

2.272 (1.915-3.403)

1.0 (0.6-1.59)

SOCS-1 mRNA levels

Mean + SE

0.541 ± 0.144

1.171 ± 0.423

0.22

Median (range)

0.425 (0.225-0.974)

1.0 (0.285-2.821)