Maternal morbidity is a public health problem in developing countries. The aim of our study was to determine the frequency of serious maternal morbidity at the Ruashi military hospital (DRC) with a view to ensuring good care and monitoring of pregnant women. A longitudinal descriptive study was conducted among 154 pregnant women in a prospective manner, data entry and analysis of results were carried out using Microsoft office 2016 and statistical test parameters were made using of Epi Info 7.2. The incidence of maternal morbidity was 24.2%, of which 32.4% had anemia followed by hemorrhage with 27% and finally sepsis and uterine subinvolution with 5.4% each. However, 94.6% had followed the prenatal consultation against 5.4% and 29.7% had a frequency of 3 participations in the prenatal consultation and finally 8.1% had a frequency of 6 participations in the CPN. The analysis showed that the frequency of prenatal consultation and postnatal visits, literacy and socio-economic level are statistically associated with maternal morbidity. Improving the socio-economic level of households, combating illiteracy and monitoring prenatal consultation are among the factors that will determine maternal morbidity.