In this article the morality involved in the surgical treatment of ectopic gestation is considered; and to have the data requisite for judgment it is necessary to describe in outline the anatomy of the uterine adnexa and the growth of the foetus; to explain the varieties, effects, diagnosis, and treatment of ectopic gestation; to present the cases of this condition, or rather this disease, as they occur in medical practice; to set forth some of the moral principles or laws that govern medical practice, especially where there is question of life and death; and finally to apply these principles to the cases offered for investigation. The uterus is in the pelvic cavity, between the bladder and the rectum and above the vagina, into which it opens. It is a hollow, pear-shaped, muscular organ, somewhat flattened, and about three inches long, two inches broad, and one inch thick. The base or fundus is upward, and the neck is downward. Passing out horizontally from the corners or horns of the uterus, which are at its base, are the two Fallopian Tubes, one on either side. These are about five inches in length and somewhat convoluted. They are true tubes, opening into the uterus, and they are about one-sixteenth of an inch in diameter along the greater part of their extent The ends farthest {2} from the uterus are fringed and funnel-shaped; and this funnel-end, called the Infundibulum or the Fimbriated Extremity, opens into the abdominal or peritoneal cavity. Near the Fimbriated Extremity of each tube is an Ovary,--an oval body about one and a half inches long by three-quarters of an inch in width. [Illustration] The Uterus and its Adnexa _F U_, Fundus or Base of the Uterus. _F T, P T_, Fallopian Tubes. On the left of the reader the Fimbriated Extremity of the tube is lifted up to show it. _O, O_, Ovaries. _B L, B L_, Broad Ligament. _R_, Rectum. _B_, Bladder. For convenience in description, each tube is divided into four parts: (1) the Uterine Portion, which is that part included in the wall of the uterus itself; it extends from the outer end of the horn into the upper angle of the uterine cavity, and its lumen is so small it will admit only a very fine probe; (2) the Isthmus, or the narrow part of the tube which lies nearest the uterus; it gradually opens into the wider part called (3) the Ampulla; (4) the Infundibulum, or the funnel-shaped end of the Ampulla. This part is fimbriated, as has been said, and one of the fimbriae--the Fimbria Ovarica--which is longer than the others, forms a shallow gutter which extends to the ovary. {3}