According to the WHO, spontaneous abortion is the expulsion of an embryo or fetus weighing less than 500 grams, corresponding to a pregnancy of 20-22 weeks of amenorrhea. Through our retrospective work conducted at the Jason Sendwe General Referral Hospital over a period from January 1, 2010 to December 31, 2011, we have attempted to clarify and justify the rate of spontaneous abortions and establish the most common causes in order to improve their management in our environments while giving much importance to the monitoring of high-risk pregnancies. Out of 8452 pregnant women, 44 cases of spontaneous abortions were noted, i.e. a frequency of 0.52%, 32 cases in 2010 and 12 in 2011. In 2010, we noted 13 cases of spontaneous abortions without etiological diagnosis, 10 cases of malaria and 4 cases of urinary infection. In 2011: malaria with 7 cases out of 12, or 58.3%. The majority of patients came mainly from the commune of Lubumbashi (65.6%) and the commune of Kampemba (18.8%) in 2010. In 2011, the commune of Lubumbashi maintained the first position with a frequency of 50% followed by the commune of Annex 25%.