It is difficult to give an in-depth description of obstetrics in all its many and varied phases in such a short paper. I merely touch upon many of these subjects, each of which could have been written upon by many persons in many volumes. Prenatal Care, for example, is a subject large enough for a thesis. I hope in this paper to have put in simple, understandable forms the basic principles of obstetrics and care of obstetrical patients, something which may be of value to anyone interested in obstetrics who might chance to read this paper.