“…Whether it is normally bilateral in pregnancy, it is most often seen as unilateral in the other presentation. In most cases no triggering events are detected, but theoretically any insult such as previous trauma (including fracture, altered biomechanics, bone edema, subchondral lesions), osteoarthritis, inflammatory diseases (i.e., arthropathies, enthesopathies, gout), vascular lesions (i.e., avascular necrosis, algoneurodystrophy), infective lesions (viral, diabetic foot, osteomyelitis), iatrogen lesions (previous surgery or radiotherapy), neoplastic lesions and other variables (alcoholic consumption, smoking, steroids, hypothyroidism, low testosterone, low vitamin D, osteogenesis imperfecta, pregnancy or breastfeeding) may determine a condition of transient bone edema of the hip [6][7][8][9][10].…”