<unk>  is a rare type of<unk>  which presents with involuntary abnormal movement, characterized by abrupt, brief, nonrhythmic, nonrepetitive movement of any limb, often associated with nonpatterned facial grimaces. It is a complication of pregnancy which can be associated with eclampsia and its effects upon the basal ganglia. It is not a causal or pathologically distinct entity but a generic term for<unk>  of any cause starting during pregnancy. It is associated with history of Sydenham's<unk> . It mostly occurs in young patients; the average age is 22 years. Recently there has been a decline in incidence which is probably the result of a decline in rheumatic fever (RF), which was a major cause of<unk>  before the use of antibiotics for streptococcal pharyngitis.
Chorea gravidarum
Encephalitis lethargica
Hydrops fetalis
Tetanus
Epidemic dropsy
Status dystonicus
Prurigo gestationis
Asclepiades of Bithynia