Variables

Group A^a

(n = 239)

Group B^b

(n = 47)

Group C^c

(n = 9)

Group D^d

(n = 7)

P value

Age (years) (mean ± SD)

25.8 ± 2.5

26.1 ± 2.9

26.2 ± 2.8

26.6 ± 3.2

0.833

BMI (kg/m²) (mean ± SD)

25.4 ± 1.4

25.5 ± 1.5

25.5 ± 1.3

24.7 ± 1.5

0.722

Parity

1 (0-1)

1 (0-1)

1 (0-1)

0 (0-1)

0.678

Infertility duration (years) (mean ± SD)

3.9 ± 1.6

4.1 ± 1.8

4.2 ± 1.9

4.4 ± 2.7

0.815

FSH (IU/mL) (mean ± SD)

6.3 ± 1.9

5.8 ± 1.9

6.7 ± 2.7

5.5 ± 2.2

0.320

Basal Estradiol (pg/mL) (mean ± SD)

71.4 ± 16.1

70.7 ± 11.9

68.8 ± 14.0

63.8 ± 19.8

0.702

Basal progesterone (ng/mL) (mean ± SD)

0.66 ± 0.15

0.84 ± 0.18

1.77 ± 0.16

1.78 ± 0.18

0.000*

Progesterone on hCG day (ng/mL) (mean ± SD)

0.64 ± 0.15

1.88 ± 0.15

1.02 ± 0.25

1.99 ± 0.51

0.000*

No. of follicles on hCG day (mean ± SD)

5.67 ± 2.15

7.31 ± 1.35

5.24 ± 1.58

7.62 ± 1.71

0.001*

Total gonadotrophins (IU) (mean ± SD)

2077 ± 164

2208 ± 177

2235 ± 171

2421 ± 124

0.000*

Duration of stimulation (days) (mean ± SD)

9.98 ± 0.95

9.87 ± 0.80

9.78 ± 0.83

10.43 ± 0.53

0.482

Endometrial thickness ET day (mm) (mean ± SD)

10.28 ± 1.18

10.41 ± 1.10

10.33 ± 0.50

9.71 ± 0.75

0.440