BACKGROUND AND OBJECTIVES: Pregnancy causes physiological and anatomical changes in the woman's body, affecting several systems such as the musculoskeletal. During pregnancy or in the postpartum period, these changes may cause low back pain or low pelvic pain, preventing the normal movement of these structures and causing suffering. The objective of this study was to discuss the diagnosis and treatment of pregnancy-related lumbosacral pain, focusing on terminology, epidemiology, risk factors, pathophysiology, prognosis, diagnosis, and treatment. CONTENTS: We searched the literature in Pubmed, Cochrane Library, Ovid and Google using the terms "low back pain", "pelvic girdle pain", "lumbopelvic pain", "posterior pelvic pain", "pregnancy-related low back pain", "pregnancy-related pelvic girdle pain" and "pregnancy-related lumbopelvic pain", for articles in English, Portuguese and Spanish in the last 20 years or older, where relevant. CONCLUSION: Pregnancy is one of the main causes of lumbosacral pain, and one of the most frequent diseases during gestation. The correct management of this pathology reduces negative impacts on the life of pregnant women.