Loss of chromosome 6q was investigated in endometrial and ovarian carcinomas by a PCR based-microsatellite polymorphism analysis. Results obtained show that this technique is able to detect frequent loss of heterozygosity in the ovarian cancers (10/27) and only in the serous type (8/17). Then, this kind of analysis can contribute to the understanding of tumor development and progression of ovarian cancers with different histopathological features.