Fear of loosening the ovum from its uterine attachment prompts experienced women to caution prospective mothers against any kind of sudden or violent effort. Their advice, however, is often needlessly alarming; a great many traditional precautions lack a reasonable basis. Thus, no harm can possibly result from sleeping with the arms above the head; nor from "over-reaching," as when hanging a picture, though a fall under such circumstances might be dangerous. Patients who have been warned by one experience should always be on their guard if they would avoid repeated miscarriages; others need only lead a sensible, hygienic life, a matter we have already discussed in the chapters dealing with the care of the body and the way to live. For the sake of emphasis, I may here repeat that no prospective mother should become fatigued from any cause; sweeping, moving heavy furniture, lifting heavy articles, and running a sewing machine are not to be attempted. But household duties which do not require strong muscular effort are better assumed than not. Amusements which may cause jolting, or expose one to the danger of falling, involve some risk of miscarriage. Short rides in a carriage or an automobile over smooth roads are free from objection. Railway- travel and sea-voyages are not advisable in the early months; after the eighteenth week they may be undertaken with a greater degree of safety, provided comfortable accommodations are assured, and the patient has never had a miscarriage. A few physicians, even at present, attribute the interruption of pregnancy to strong emotions, including intense joy or sorrow, anger, fright, or even jealousy. Without denying altogether the possibility of such an influence, we may be sure that its importance is greatly exaggerated. It is not unusual to see patients who are able to recall a mental shock of some kind shortly before the miscarriage occurred; nevertheless, in such cases diligent search will usually reveal a physical cause for the accident. Another popular fallacy relates to the effect of drugs upon pregnancy. The use of castor oil and other strong purgatives do not interrupt it. Should the administration of any cathartic be followed by miscarriage, some fault inherent preexisted in the pregnancy, and no amount of precaution would have enabled the patient to reach full term successfully. Quinin in tonic doses may be taken with impunity, and even larger quantities are being constantly used for the cure of malaria without doing the pregnancy any harm. Many other drugs are reputed to have great efficacy in causing the expulsion of the product of conception; unfortunately, they are too well known to require enumeration. They are usually unreliable, and are absolutely inefficient in doses small enough not to endanger the mother's life, provided the pregnancy is a healthy one.