A certain amount of exercise, in the shape of light housework, may be taken indoors. This is distinctly beneficial if not continued to the point of fatigue, both because of the exercise which it provides, and also the diversion and interest, for these promote mental and physical health. But this indoor exercise must not interfere with, nor to any degree replace the daily exercise which you take out of doors; nor must it include heavy work, such as washing, sweeping, heavy lifting, running a sewing machine by foot or much running up and down stairs. However, the amount and kind of work which the expectant mother may comfortably and safely do, are so related to what she has been accustomed to, that it is not possible to do more than describe what has proved of benefit for the average woman. There are women to whom massage and gymnastics are helpful during pregnancy when for some reason the out-of-door activities are not possible or advisable. This might be true of an expectant mother with heart trouble, for example, or of one who is being kept in bed to prevent an abortion and accordingly is a matter which is closely directed by the doctor. =Traveling.= In general, traveling is less dangerous for the expectant mother of to-day than formerly because it causes less strain, discomfort and fatigue than in the old days. But the question cannot be settled once for all women nor for all stages of pregnancy. Each woman’s general condition must be considered; her tendency to nausea; the length of the journey and the ease with which it may be made; also, whether or not she has ever had or been threatened with an abortion. As a rule, it is considered wise to avoid traveling during the first sixteen and the last four weeks of pregnancy, and at the time of the month when menstruation would ordinarily occur. Certainly a journey should not be undertaken at any time during pregnancy without a doctor’s permission. =Rest and Sleep.= When we studied the changes that take place during pregnancy we found that as the abdomen increased in size and weight the expectant mother was required to make a constant, though unconscious effort to stand upright. This is probably one reason for the fatigue which she so often feels without apparent cause, and why, upon exertion, she tires more easily than usual. Accordingly, you may find it necessary to rest frequently during the day in order to avoid the ill effects of fatigue. It is a good plan to work and exercise in short periods rather than long, always lying down when tired, and for an hour or two after the noon meal. You should be careful not to be over active or to overexert yourself at the time when menstruation would occur if you were not pregnant, for fear of bringing on an abortion. This precaution is particularly important during the first four months, the period when abortions occur most frequently.