Background & Objective: Transient hip osteoporosis is uncommon but is believed to be undiagnosed and underestimated in frequency. This research is a systematic review to summarise the information available about transitory migrating hip joint osteoporosis during pregnancy. Methods: A complete computerised search for papers published in the database of PubMed using the following keywords: "migratory osteoporosis during pregnancy," "transient hip osteoporosis during pregnancy" Results and findings: This disease has no recognised aetiology and pathophysiology, and mostly affects middle-aged men and women in the final quarter of pregnancy. MRI is the best way to diagnose TOH and to rule out oh hip pain in other situations. On T1-weighted images with high signal intensity, MRI shows the homogeneous pattern of marrow edoema with intermediate signal sequences. TOH is an autonomous condition which is resolved progressively within 6–8 months. No procedure is required for this disease and treatment includes basically a symptomatic relief and protected weight bearing till osteoporosis improves, and it is important that TOH be differentiated from avascular necrosis of hip on MRI to avoid surgery with needles. Medical treatments (including teriparatide, biphosphonates, calcitonin, vitamin D) may decrease the duration of symptoms on the basis of reports in the literature. Core decompression in TOH alone is no better than medical treatment. Further research and randomised clinical trials are necessary to compare different ways of therapy.