Although there can be no doubt that the routine correction of uterine displacements shortly after labor would go far toward restricting the occurrence of subsequent miscarriage, it would be incorrect to leave the impression that miscarriage will always occur if the uterus is out of its normal position. Not infrequently the changes wrought by pregnancy will cause the uterus to right itself spontaneously. Another important cause of miscarriage consists in abnormalities in the lining of the uterus. Through inherent defect or acquired disease this tissue may become unsuited for anchoring or nourishing an ovum. In either event, a surgical procedure, known as curettage, affords the most likely means of restoring it to a healthful state. The operation removes the old lining; and a new one quickly develops, which is often more capable of fulfilling the purpose for which it is intended. An appreciable number of miscarriages depend upon conditions over which medical skill has no control. Under such circumstances, though the accident may be regretted, there is no room for remorse or censure. Often the embryo should bear the blame; if its development is imperfect or if it dies, miscarriage usually occurs very promptly. We are familiar also with a few maternal conditions which seriously affect the embryo, often seriously enough to cause its expulsion, alive or dead. In this respect, certain constitutional disorders are preeminent. Bright's disease and diabetes are prejudicial to the development of the embryo; women suffering from either of them must be watched with great care. Occasionally, such pregnancies come to a premature end in spite of every precaution. Various infectious diseases, as typhoid fever and pneumonia, also are fatal to the embryo if the causative bacteria pass into it. Fortunately this rarely happens, since the placenta generally affords an effectual barrier to their entrance into the embryo. Organic diseases of the mother's heart also may bring about miscarriage. A patient thus affected should place herself under the supervision of a physician as soon as conception is suspected. Now and then physicians are completely at a loss to explain cases of miscarriage. Our ignorance is unfortunate, particularly when repeated miscarriages have occurred and their causation cannot be detected. HABITUAL MISCARRIAGE.--Experience teaches that women who have had one miscarriage must be more careful than other prospective mothers if they would escape a repetition of the accident. Persons who know themselves to be subject to miscarriage should regard no precaution as too burdensome. Not only should they avoid motoring, driving, railroad journeys, sea voyages, and every kind of strenuous exertion, they must accept every opportunity to be quiet and rest. Often such hygienic care yields sufficient protection; but occasionally medicine is also necessary.