Table 1

Reported primary infertility^1-150 by age at first consultation for infertility or conception of first child (if no fertility problem)

Age at first consultation for infertility or conception of first child (if no fertility problem)	All workers^1-151	Primary infertility, no conceptions n (%)	Primary infertility, no pregnancies reaching ⩾24 weeks n (%)
Male workers:
<25	857	5 (0.6)	5 (0.6)
25–29	2348	49 (2.1)	55 (2.3)
30–34	1415	50 (3.5)	57 (4.0)
35–39	550	23 (4.2)	27 (4.9)
⩾40	183	14 (7.7)	20 (10.9)
Total	5353	141 (2.6)	164 (3.0)
		χ² _trend: p<0.0001	χ² _trend: p=0.002
Female workers:
<25	175	0 (0)	2 (1.1)
25–29	245	10 (4.1)	12 (4.9)
30–34	117	5 (4.3)	6 (5.1)
35–39	56	7 (12.5)	8 (14.3)
⩾40	10	0 (0)	1 (10.0)
Total	603	22 (3.7)	29 (4.8)
		χ² _trend: p<0.0001	χ² _trend: p=0.002

↵1-150 Primary infertility defined as (a) having consulted a clinician about problems achieving a pregnancy, and never having achieved a pregnancy; and (b) having consulted a clinician about problems achieving a pregnancy, and never having achieved a pregnancy lasting ⩾24 weeks of gestation.
↵1-151 Aged ⩾40 at time of survey, and who had been employed when their first child was conceived, or when they were first attempting to have a child.