his work is a prospective study that aims to evaluate the vitamin D status of Moroccan women during the last trimester of their pregnancy to establish the prevalence of hypovitaminosis D. We carried out, within the Mohammed V Military Teaching Hospital (HMIMV), a six-month prospective study on the vitamin status D of 152 Moroccan women during their last gestational trimester. Maternal blood was collected at the Gynecology-Obstetrics Department during the last prenatal visit or during the delivery process. Serum assays for 25 (OH) D3, PTH, calcium, phosphorus and PAL were performed in the HMIMV Biochemistry Laboratory. A questionnaire was developed to reveal different parameters influencing vitamin status. The vitamin D deficiency rate is very high in our study sample. We found 97.37% hypovitaminosis D (

25-hydroxy-vitamin D3, calciferol, pregnancy