Table 2 Descriptive information of couples

1

35, m.d.^a

25

1

Male + Female

2

22, 23

32

1

Male + Female

3

34, 38

25

2

Male + Female

4

32, m.d.

20

2

Male + Female

5

34, m.d.

38

1

Female + Female

6

28, 27

12

1

Male + Female

7

25, 28

18

1

Male + Female

8

29, 30

37

1

Male + Female

9

27, 28

13

2

Male + Female

10

m.d., 24

29

1

Male + Female

11

32, m.d.

36

1

Male + Female

12

27, 31

34

1

Male + Female

13

24, 26

36

2

Male + Female

14

27, 24

32

1

Male + Female

15

23, 24

11

1

Male + Female

16

30, 31

12

1

Male + Female