Table 1 Medical, Family and Environmental Histories of the 33 Cases and 27 Controls

 Pregnancy (conception)*

5

[3-6]

2

[1-6]

 Live birth*

0

[0–1]

1

[1-4]

 Miscarriage*

3

[3-6]

0

[0–2]

 Time to conceive for the first conception (months)

3

[0–18]

2

[0–18]

 Time between the end of the first conception and the beginning of the second attempt at conception (months)

6

[0–64]

16

[1–80]

 Age (years)

34

[30–36]

33

[29–35]

 Body mass index (BMI)*

25

[23-27]

24

[22-25]

n

(%)

n

(%)

History of infections

3

(9)

6

(22)

Cryptorchidism

2

(6)

1

(4)

Varicoceles

2

(6)

3

(11)

Normal vas deferens

33

(100)

27

(100)

Abnormal epididymal position

0

(0)

1

(4)

 before 12 years old

2

(6)

1

(4)

 after 12 years old

29

(94)

26

(96)

Family history of infertility*

16

(53)

6

(24)

Family history of miscarriage*

9

(36)

2

(9)

Family history of cancer

13

(43)

8

(33)

  < 10/day

4

(12)

4

(15)

  ≥ 10/day

7

(21)

7

(26)

Drug consumption

6

(18)

6

(22)

 occasional

29

(88)

22

(81)

  < 1 L/day

1

(3)

4

(15)

 *: large urban

12

(36)

19

(70)

 small urban

13

(39)

5

(19)

 rural

8

(24)

3

(11)

Environmental/professional exposure

12

(36)

6

(22)