Objective: to describe the clinical periodontalstatus and the subgingival microbiotacomposition in a group of 81 women havingpreeclampsia.Methods: clinical, medical and periodontal datawere determined in women with preeclampsiaat the University Hospital of Valle in Cali-Colombia.Periodontal status and diagnosis weredetermined by means of probing depth andclinical attachment level (Diagnosis Consensus AAP-1999). A sample of subgingival plaquewas taken for microbiological analysis.Results: 63% of the cases had mild preeclampsiaand 27.2% had severe preeclampsia. Theperiodontal status was affected in 91.4% of patients(n=64); 59.3% (n=48) of them presentedchronic periodontitis and only 8.6% presentedhealthy periodontium. Periodontopathic bacteriawas found in preeclamptic women, the mostprevalent microorganisms were Fusobacteriumssp 80.2% (n=65), P. gingivalis 59.3% (n=48)and Prevotella intermedia/nigrescens 51.9%(n=42).Conclusion: preeclamptic women showed ahigh percentage of chronic periodontitis andpresented also periodontopathic microbiota. Alow percentage of pregnant women presentedhealthy periodontium.