Table 1 Basic clinical parameters and pregnancy outcomes of three study groups

N

75

66

258

Female age (year)

30.4 ± 4.3

30.2 ± 4.8

31.1 ± 4.0

0.310

Male age (year)

33.2 ± 6.1

32.8 ± 5.9

33.3 ± 5.3

0.895

Body mass index (BMI, kg/m2)

21.0 ± 2.6

21.1 ± 2.7

20.9 ± 2.7

0.910

Type of infertility (n (%))

0.834

Primary

42 (56.0)

38 (57.6)

148 (57.4)

Secondary

33 (44.0)

28 (42.4)

110 (42.6)

Duration of infertility (year)

2.3 ± 1.2

2.4 ± 1.1

2.9 ± 2.1

0.017^*

Basal FSH (mIU/ml)

6.5 ± 1.9

6.4 ± 2.2

6.5 ± 2.0

0.903

No. of dominant follicles > 16 mm

1.0 ± 0.2

1.6 ± 0.6

1.0 ± 0.1

0.186

Endometrium thickness (mm)

10.1 ± 1.7

10.0 ± 1.9

10.1 ± 1.6

0.969

Total progressive motile sperm count (post-wash)

19.3 ± 11.4

22.4 ± 13.1

18.3 ± 11.2

0.512

Normal morphology (%, post-wash)

4.7 ± 1.9

4.8 ± 1.6

4.4 ± 1.9

0.160

tubal occlusion site

/

proximal tubal occlusion

53 (70.7)

50 (75.8)

/

mid-distal or distal tubal occlusion

22 (29.3)

16 (24.2)

/

Clinical pregnancy (n (%))

7 (9.3)

6 (9.1)

28 (10.9)

0.706

Live birth (n (%))

4 (5.3)

4 (6.1)

25 (9.7)

0.239

First trimester miscarriage (n (%))

3 (42.9)

0 (0)

2 (7.1)

0.044^*