Objective: We aim to study the clinicalcharacteristics, the evolution of COVID-19 on pregnant women and survival factors. Study design: Its a prospective cohortstudy in a large tertiary maternity unit within the Mother and Child University Hospital Ibn Rochd of Casablanca with an average annual birth of over 6950 births. We prospectively collected and analyzed data for a cohort of 40 pregnant patients tested positive for COVID-19 between January 2020 and December 2020 inclusive to assess the effect of COVID-19 on pregnancy. Results: Forty pregnant patients testedpositive for COVID-19, 36 patients gave birth and 4 patients died pregnant. The severity of the symptoms ranged from mild in 20/40 (50%) of the patients, moderate in 7/40 (17,5%), and severe in 13/40 (32,5%). Thirteen of our patients were admitted to invasive care units, six were in their third trimester, and seven in their second trimester nine were intubated and ventilated prior to delivery and three of them required Extracorporeal membrane oxygenation. Among these patients intubated only two survived. Most common comorbidities were gestational diabetes 4/40 (10 %), asthma 4/40 (10 %), preeclampsia 7/40 (17,5%). Of the 40 pregnant patients 31 (77,5%) were in their third trimester, 8 (20%) women in their second trimester, and one in her first trimester. Of the 36 patients who delivered, 12/36 (33,3 %) were preterm delivered by elective C-sections. The death rate was 17,5% (7/40). Conclusion: COVID-19 is associated with high prevalence of preterm birth, caesarean section, and a high mortality rate.