Background: The influence of social class on the composition of infert
ile groups and on their use of health care services could reflect how
the latter meet the non-urgent needs for health care in populations. M
ethods: Clinical, demographic, and occupational variables were collect
ed prospectively from 2,198 couples newly registered in 11 infertility
clinics. Time to diagnostic laparoscopy and time to treatment were ev
aluated with the use of proportional hazards analysis. Results: 1) In
the upper quartile of family income, the duration of infertility was s
ix months less than for couples with the lowest incomes; 2) Tubal infe
rtility was independently associated with lower family income; 3) Occu
pation and income were unrelated to the likelihood of either a complet
e diagnostic assessment or treatment for the infertility. Conclusions:
Social class seems an important factor in the distribution of inferti
lity diagnoses, although occupation and income were not associated wit
h important clinical management decisions.