Table 4 Knowledge about fertility issues^a

At what age are women the most fertile?

15–19 years

17 (23)

67 (15)

0.30

20–24 years^a

38 (50)

262 (61)

25–29 years

20 (26)

94 (22)

30–44 years

1 (1)

7 (2)

Missing

3

8

At what age is there a slight decrease in women’s ability to become pregnant?

15–24 years

7 (9)

31 (7)

0.07

25–29 years^a

23 (30)

191 (45)

30–34 years

34 (45)

134 (31)

35–59 years

12 (16)

72 (17)

Missing

3

10

At what age is there a marked decrease in women’s ability to become pregnant?

25–34 years

20 (26)

139 (33)

0.23

35–39 years^a

22 (29)

134 (31)

40–44 years

20 (26)

108 (25)

45–49 years

14 (19)

45 (11)

Missing

3

12

If a young woman and man have unprotected intercourse at the time of ovulation - how large is the chance that she will become pregnant?

0–29%

18 (25)

61 (15)

0.06

30–39%^a

8 (11)

29 (7)

40–49%

4 (5)

17 (4)

50–100%

43 (59)

310 (74)

Missing

6

21

 How large is the chance she will become pregnant if she is 25–30 years?

0–69%

35 (47)

182 (45)

0.06

70–79%^a

21 (29)

74 (18)

80–89%

9 (12)

98 (24)

90–100%

9 (12)

53 (13)

Missing

5

31

 How large is the chance she will become pregnant if she is 35–40 years?

0–49%

59 (80)

290 (72)

0.047

50–59%^a

8 (11)

57 (14)

60–69%

1 (1)

38 (10)

70–100%

6 (8)

17 (4)

Missing

5

36

How many couples are involuntarily infertile?

0–4%

1 (1)

6 (2)

0.21

5–9%

9 (12)

31 (8)

10–19%^a

32 (43)

135 (34)

20–90%

33 (44)

226 (56)

Missing

4

40

What are the chances on average of achieving a child from IVF treatment?

0–19%

12 (16)

60 (16)

0.82

20–29%^a

21 (29)

96 (25)

30–39%

11 (15)

52 (13)

40–100%

29 (40)

175 (46)

Missing

6

55