The product of conception is not always entirely gotten rid of. If a fragment remains, no matter how trifling in size, it may serve as the channel of the most severe and constant hemorrhagic discharge. Of this, examples are by no means infrequent; the flux lasting at times for very many months, and, if the cause is not finally detected and removed, hurrying the patient to her grave. The product of conception is sometimes retained entire, after its detachment from the uterine walls has been supposed wholly effected. It may be carried for many years, always acting as a foreign body; at times occasioning extreme irritation, shown perhaps only by distant and otherwise inexplicable symptoms, or it may lie dormant for a time without apparent trouble--finally making itself known by some sudden explosion of disease, whether by purulent absorption and general pyæmia; by ulceration and discharge of fœtal debris, through the intestines, bladder, or even abdominal integuments; or, by metritic inflammation, followed by sympathetic or consequent fatal peritonitis. The patient, after an abortion, is very liable to one or another of the forms of uterine displacement, which are now known to lie at the foundation of so very large a proportion of the lame backs, formerly supposed consequent on spinal irritation; of the painfully neuralgic breasts, so often suggestive of incipient cancer; of the disabled limbs, pronounced affected with sciatica, cramps, or even paralysis; of the impatient bladders, from whose irritability or incontinence the kidneys are supposed diseased; of the obscure abdominal aches and pains, which unjustly condemn so many a liver and so many an ovary; of the constipation from mere mechanical pressure, which is so often thought to argue stoppage from stricture or other organic disease; of the severe and intractable headaches that, resisting all and every form of direct or constitutional treatment, are supposed to indicate an incurable affection of the brain; of the easily deranged stomachs, that are so suggestive of ulceration or of malignant degeneration; of the general hypochondria and despondency, that of the most gentle, even almost angelic, dispositions make the shrew and virago, and of the purest and most innocent produce, in her own conceit, the worst of sinners, even at times effecting suicide. Who that has suffered will think this picture overdrawn? Who that has practised will not recognize in displacements, the key by which these riddles may be solved?