Intrauterine fractures are occasionally seen, but are generally the results of traumatism or of some extraordinary muscular efforts on the part of the mother. A blow on the abdomen or a fall may cause them. The most interesting cases are those in which the fractures are multiple and the causes unknown. Spontaneous fetal fractures have been discussed thoroughly, and the reader is referred to any responsible text-book for the theories of causation. Atkinson, De Luna, and Keller report intrauterine fractures of the clavicle. Filippi contributes an extensive paper on the medicolegal aspect of a case of intrauterine fracture of the os cranium. Braun of Vienna reports a case of intrauterine fracture of the humerus and femur. Rodrigue describes a case of fracture and dislocation of the humerus of a fetus in utero. Gaultier reports an instance of fracture of both femora intrauterine. Stanley, Vanderveer, and Young cite instances of intrauterine fracture of the thigh; in the case of Stanley the fracture occurred during the last week of gestation, and there was rapid union of the fragments during lactation. Danyau, Proudfoot, and Smith mention intrauterine fracture of the tibia; in Proudfoot's case there was congenital talipes talus. Dolbeau describes an instance in which multiple fractures were found in a fetus, some of which were evidently postpartum, while others were assuredly antepartum. Hirschfeld describes a fetus showing congenital multiple fractures. Gross speaks of a wonderful case of Chaupier in which no less than 113 fractures were discovered in a child at birth. It survived twenty-four hours, and at the postmortem examination it was found that some were already solid, some uniting, whilst others were recent. It often happens that the intrauterine fracture is well united at birth. There seems to be a peculiar predisposition of the bones to fracture in the cases in which the fractures are multiple and the cause is not apparent. The results to the fetus of injuries to the pregnant mother are most diversified. In some instances the marvelous escape of any serious consequences of one or both is almost incredible, while in others the slightest injury is fatal. Guillemont cites the instance of a woman who was killed by a stroke of lightning, but whose fetus was saved; while Fabricius Hildanus describes a case in which there was perforation of the head, fracture of the skull, and a wound of the groin, due to sudden starting and agony of terror of the mother. Here there was not the slightest history of any external violence.