Type 2 is the most common form of pelvic instability. Treatment is based on learning how to use the muscles around the pelvis more efficiently. Pelvic type 3:The ligaments do not support the joint sufficiently. This is a serious
situation whereby the muscles around the joint are unable to compensate for ligament weakness. This type of pelvic instability usually only occurs after an accident, or occasionally after a (small) accident in combination with giving birth. Sometimes a small accident occurring long before giving birth is forgotten so that the pelvic instability is attributed only to the childbirth. Although the difference between Type 2 and 3 is often difficult to establish, in case of doubt an exercise program may help the patient. However, if Pelvic Type 3 has been diagnosed then invasive treatment is the only option: in this case parts of the pelvis are screwed together. (Mens 2005)

Psychosocial impact
PGP in pregnancy seriously interferes with participation in society and activities of daily life; the average sick leave due to posterior pelvic pain during pregnancy is 7 to 12 weeks.In some cases women with PGP may also experience emotional problems such as anxiety over the cause of pain, resentment, anger, lack of self-esteem, frustration and depression; she is three times more likely to develop postpartum depressive symptoms. Other psychosocial risk factors associated with woman experiencing PGP include higher level of stress, low job satisfaction and poorer relationship with spouse.
Central diabetes insipidus, also called neurogenic diabetes insipidus, is a type of diabetes insipidus due to a lack of vasopressin (ADH) production in the brain. Vasopressin acts to increase the volume of blood (intravascularly), and decrease the volume of urine produced. Therefore, a lack of it causes increased urine production and volume depletion. It is also known as neurohypophyseal diabetes insipidus, referring to the posterior pituitary (neurohypophysis), which is supplied by the hypothalamus in the brain. This condition has only polyuria in common with diabetes. Although not mutually exclusive, with most typical cases, the name diabetes insipidus is a misleading misnomer. A better name might be "hypothalamic-neurohypophyseal ADH deficiency". Signs and symptoms
Increased thirst, polyuria and dehydration with metabolic encephalopathy. Causes
Unknown
In at least 25% of cases (the most commonly occurring classification), neurogenic diabetes insipidus is of unknown cause, meaning that the lack of vasopressin production arose from an unknown cause. It is also due to damage of the hypothalamus, pituitary stalk, posterior pituitary, and can arise from head trauma. Acquired
The lack of vasopressin production usually results from some sort of damage to the pituitary gland. It may be due to damage to the brain caused by:

Benign suprasellar tumors (20% of cases)
Infections (encephalitis, tuberculosis, etc.) Trauma (17% of cases) or neurosurgery (9% of cases)
Non-infectious granuloma (sarcoidosis, Langerhans cell histiocytosis etc.) Leukaemia
Autoimmune - associated with thyroiditis
Other rare causes which include hemochromatosis and histiocytosis.Vasopressin is released by the posterior pituitary, but unlike most other pituitary hormones, vasopressin is produced in the hypothalamus.