Usually the symptoms make it clear that labor has begun, but occasionally the greatest difficulty will be experienced in deciding whether the discomfort has not some other origin. Uncertainty may prevail not only because of the similar effects of colic, but also from the fact that uterine contractions do not always have the same value. Preliminary pains may appear several days, or even weeks, before the actual onset of labor. Now and then the "false" pains cease, and after a period of comfort efficient contractions are established. There is never difficulty in recognizing the latter; doubt always relates to the preliminary pains, which may subside or may pass into the efficient type. We lack a method of foretelling which turn they will take; developments may be calmly awaited, with the assurance that ample warning will precede the birth. A slight mucous discharge from the vagina is frequently seen toward the end of pregnancy and may be disregarded, but a gush of watery fluid always means that the sac which contains the fetus has ruptured. Uterine contractions generally follow within a few hours, though in a few instances they will not appear for a number of days. Under any circumstances the event ought to be promptly reported to the doctor. Similarly, he should be notified whenever bleeding from the vagina occurs, since it is important to have him determine its significance. Anyone who supposes that patients are more likely to be infected when delivery occurs so quickly that there is not time for the doctor to arrive overlooks the leading factor in the production of this complication. Unless harmful bacteria are introduced into the birth- canal and lodge there, infection is impossible. Bacteria never enter of their own accord; they are usually carried into the vagina by means of an examining finger or some other foreign body. Accordingly, with the exception of those instances in which local inflammation already exists, there is no reason to fear infection when delivery proceeds so rapidly that internal examinations are not required. PERSONAL PREPARATIONS.--Ordinarily, if the nurse is not already in the house, she will arrive in time to assist the patient in making the final arrangements for delivery. Should the nurse be delayed, the patient herself may make certain preparations to insure personal cleanliness, another very important factor in the prevention of infection. The presence of hair and the folding of the skin about the outlet to the birth-canal render the disinfection of this area somewhat difficult. It is advisable, therefore, to clip the hair as short as possible and, while bathing the whole body, to scrub the region in question with especial thoroughness. Before the bath an enema of soap-suds should be taken to clear the rectum of material which otherwise might be expelled during the birth and contaminate the field of delivery. The bath-towels and the gown which are used should have been freshly laundered.