A specific cause for the separation of the<unk><unk>  during pregnancy and delivery has not been identified by researchers as of date. Thoughts surrounding the hormone relaxin and its effect on the laxity of ligaments during pregnancy have been investigated, but no direct cause of this hormone to<unk>  has been identified. Relaxin, in conjunction with progesterone, can cause a physiological separation of the<unk><unk>  during pregnancy that typically measures 3-5mm and is most pronounced in the first trimester and returns to normal size within 5 months postpartum. Risk factors associated with the condition have been identified and include cephalopelvic disproportion, large fetuses, epidural anesthesia, the use of forceps, primigravida, multiple gestations, previous of difficult delivery such as shoulder dystocia, and previous pre-existing pelvic injury or pathology. Risk factors can further be stratified by causes including enzymatic causes such as disturbances in collage synthesis, endocrine causes related to hormones produced in pregnancy such as progesterone, estrogen and relaxin, inflammatory processes, metabolic disturbances in the production of vitamin D and calcium and pelvic instability such as congenital malformations and excessive lumbar lordosis. In addition, outside of pregnancy and post-partum states, separation of the<unk><unk>  can be seen in the setting of trauma. These cases are related to injuries sustained from high velocity injuries such as motor vehicle accidents, falls from large heights, falling from a horse and crush injuries.
Pubic Symphysis Diastasis
Vertebral hemangioma
Spinal epidural hematoma
Epidural abscess
Cervical spinal stenosis
Vertebral osteomyelitis
Diastematomyelia
Spinal fracture