For the sake of simplicity and clarity I have divided the book into seven parts, following an introduction which describes the requisites and opportunities of obstetrical nursing and the importance of the nurse’s own attitude toward her work and her patient. The first two parts, dealing with the normal anatomy and physiology of the female generative tract and the development of the fetus, are designed to supply the nurse with enough technical information to make her ministrations intelligent and effective. In this respect, I have doubtless given less than some nurses will wish and possibly more than others will think necessary, but I have given about the average amount of instruction that is found satisfactory in the training schools of high standing. Four of the succeeding parts are devoted respectively to a description of the nurse’s duties during pregnancy, labor, the puerperium and early infancy. In each of these I have explained, first, the normal physiological processes which take place; then, the nurse’s duties under average conditions and finally, her responsibilities in the event of complications or abnormalities. A separate part is devoted to a description of the organized care and instruction of the maternity patient, by public health nurses, both before and after delivery, which have proved to be satisfactory. While describing various hospital procedures, I have deemed it of practical importance to explain, in each instance, how similar results might be obtained, with improvised appliances, in a patient’s home whether in a city or a rural community. In short, I have endeavored to make clear the essentials of obstetrical nursing without regard to the status or location of the patient. Since the patient’s state of nutrition and her frame of mind are of vital importance throughout pregnancy, labor and the puerperium, I have not only dwelt upon them in all descriptions of the nurse’s duties during these periods but have devoted an entire chapter to a simple explanation of the principles of each of these two important subjects. My varied contact with obstetrical nurses has convinced me that those nurses who appreciate the never ending wonder and beauty of this miracle of the beginning of a new life, derive peculiar satisfaction from the care of the maternity patient. At the same time, in many hospitals, even where the patients are given the most conscientious care, the nurses are often so nearly overwhelmed by the long, irregular hours and the insistent demands of routine duties, that they do not grasp the significance of the event in which they are participants. Accordingly, I have made a sustained effort throughout the following pages to give the young nurse something of a feeling of reverence for this great mystery of birth.