Table 1 Baseline demographic characteristics

Age (years)

 All women

35.8 ± 3.4

34.3 ± 3.70

0.051^c

Age distribuition

 <35

15 (34%)

147 (49%)

0.120^a

 35-37

14 (32%)

83 (28%)

 38-40

15 (34%)

67 (23%)

Ethnicity

< 0.001^b

 White

26 (59.1%)

287 (96.6%)

 Brown or black

16 (36.4%)

2 (0.7%)

 Yellow

2 (4.5%)

8 (2.7%)

Weight (kg)

70.4 ± 11.5

64.9 ± 10.2

< 0.001^c

BMI (Kg/m²)

25.9 ± 3.2

23.7 ± 3.35

< 0.001^c

Time of infertility (in months)

58.2 ± 38.2

37.2 ± 27.2

< 0.001^c

Cause

< 0.001^b

 Tubal abnormalities

19 (52.8%)

41 (13.8%)

 Unexplained

8 (18.2%)

125 (42.1%)

 Endometriosis stage I/II

5 (13.9%)

11 (3.7%)

 Male factor

16 (44.4%)

118 (39.7%)

 Other

0 (0)

2 (0.7%)

 AFC, 2 -10 mm (n)

9.5 ± 3.89

11.5 ± 5.06

0.007^c

 AMH (ng/mL)

1.20 ± 0.50

1.18 ± 0.50

0.495^c

 Basal FSH (IU/L)

7.1 [5.9 - 8.9]

8.5 [6.9 - 10.6]

0.003^c

 Basal estradiol (pg/mL)

49.9 [36.1 - 65.9]

43.6 [33.2- 55.0]

0.024^c

 Progesterone (ng/mL)

0.8 [0.6 - 1.2]

0.5 [0.2 - 0.7]

< 0.001^c

 TSH (mIU/L)

1.8 [1.3 - 2.4]

1.5 [1.1 - 2.0]

0.005^c