Arterial hypertension and pregnancy is common and remains a leading cause of maternal and fetal mortality and morbidity. The aim of this work is to study the peculiarities of this high-risk pregnancy. This is a retrospective study of 544 cases of hypertension and pregnancy collected at the LallaMeryem maternity hospital Ibn Rochd hospital in Casablanca for a period of 2 years. The incidence is 9.2%. The average age of onset was 30 years with an age range of 15 to 45 years. The primiparous were the most exposed 261 cases (48%).310 cases (57%) have an unguarded pregnancy. 290 cases (53.3%) had a systolic blood pressure greater than or equal to 160 mm Hg, and 160 cases (29.4%) had a diastolic blood pressure ≥ 110 mmHg. The most used medical conduct was the combination of rest and antihypertensives. Obstetrical behavior was marked by the frequency of vaginal deliveries (63.4%). Maternal complications represent (14.7%) dominated by retroplacental hematoma (5.1%) and eclampsia (3.7%). Perinatal mortality represents 57 cases (9.9%). The factors of bad fœto-maternal prognosis are for the fetus: the low gestational age, the low parity, the non monitoring of the pregnancy, the massive proteinuria and the hyperuricemia. For the mother, young maternal age, primiparity, non-pregnancy status, diastolic blood pressure ≥ 110 mm Hg, systolic blood pressure ≥ 160 mm Hg, and massive proteinuria. Careful monitoring of pregnancies, early diagnosis of high blood pressure and better management of the mother and child, as well as a better knowledge of the fetal and maternal prognostic factors, contribute to the reduction of complications of arterial hypertension during pregnancy