Prospective study has been conducted with regards to systematic cytological and bacteriological urine examination, including 505 pregnant women examined from April to May 2006. The results have shown that 50 persons have a positive urine cytology representing 9.9% of the population. The age range from 20-34 was mostly represented 66% of cause. Almost 90% of the patients has a history of urinary tract infection. Leukorrhea was present in 94% of examined women. The urine culture has concluded to E. coli infection was asymptomatic, against 50% of Staphylococcus aureus. We have noticed 16% complications related 3 premature deliveries, 4 abortions and 1 death in utero. Early diagnostic of urinary tract infection based on urine analysis on antibiotic selection by any pregnant women is the key of the prevention.