Background: Late pregnancies are a hot topic for both women and health professionals, due to their increasing increase and their prone to more complications, both during pregnancy and for the unborn child. The objective was to assess the rate of obstetric pathologies according to age group, in order to determine whether pregnancies at an advanced age require special monitoring. Material and Methods: this was a retrospective case-control analytical study over a period of eighteen months, taking place from January 1, 2023 to June 30, 2024 in the obstetrics and gynecology department of the Mali Hospital in Bamako. The study population was divided into two groups: cases, represented by patients 35 years of age or older in early pregnancy, and controls, patients under 35 years of age in early pregnancy. The inclusion criteria were all patients followed in antenatal consultations and presenting with a singleton pregnancy at our department during the study period. The criteria for non-inclusion were multiple pregnancies and those resulting from medically assisted reproduction (ART). Data entry and statistical analysis were performed by SPSS software. The Pearson chi-2 test as well as the Fisher exact test with a significance threshold of 5% (p ˂ 0.05) were used for the interpretation of the data. Results: The out-of-school population was the most represented (54%, (n = 281/515) with 43% (n = 223/515) and 11% n = 58/515) respectively among those under 35 years of age and among those 35 years of age or older. Pre-existing conditions such as diabetes and chronic hypertension were significantly associated with age groups with a higher percentage in those aged 35 or over than in those under 30 years of age with respectively (4% versus 3% diabetic) and (5% versus 2% chronic hypertensive). Obstetric complications were most common among women aged 35 years and older. hypertensive disorders of pregnancy (gestational hypertension, preeclampsia) were significantly more frequent in women from the age of 35. The pregnancy hypertension rate was 5.6% to 3.4%) respectively in those aged 35 or over versus under 35 years. As for gestational diabetes, the rate was 10% versus 2% respectively in those over 35 and over versus those under 35. Conclusion: Our study shows that maternal age of thirty-five years or more plays a role in maternal complications.