In 4,396 invasive cervix carcinomas treated between 1934 and 1973, 52 occurred during pregnancy or within 3 months post partum. Stages I were more frequent among pregnant women (24%) than without pregnancy (8%) and stages II were as frequent (50%). Stages I and II were more frequent among pregnant women treated during 1963-1973 than 1934-1962. The 3 years' survival rate, all stages combined, for pregnant women (42%) was lower than for matched control non-pregnant women (62%). This difference was significant at P = 0.05, but at 5 and 10 years, the difference was not significant for patients treated between 1963-1973. At an equal stage, survival rate seemed lower for stages IIb and III (P = 0.02 for these two stages combined.) The lymph node involvement was not more frequent; the decrease of global survival rate could be associated to some factors and especially incomplete therapy and an under-estimation of the tumor extension because of the pregnancy. Our results are compared to the data literature and therapeutic schedules are discussed.