A retrospective review of case records for the years 1967-1987 revealed 41 patients with invasive cancer of the uterine cervix associated with pregnancy. The prevalence of pregnancy in patients referred on account of invasive cancer of the uterine cervix savings between 0.7% and 3.5%, but despite the extensive cytological screening of fertile women, no decrease has been observed. The average patient is 31.5 years, 3.7 gravida and 3.0 para. The five-year survival for the disease in stage I b is found to be 70% and thus now appears to be poorer than in non-pregnant women. On this background and as 39% were asymptomatic, routine smear examination is recommended at the first antenatal examination. If deviations in the cell pattern are found, meticulous follow-up must be performed with colposcopy and biopsy specimens so that the question of invasive growth can be elucidated as early as possible during pregnancy and, when this is present, adequate treatment must be instituted.