In discussing the subject of extra-uterine pregnancy, it is advisable to begin by directing our attention to the locations at which fecundation takes place. There are three sites at which it is supposed to occur, viz.: the Fallopian tubes, the ovaries, and in the peritoneal cavity.
There are several varieties of the three species just alluded to. The tubo-ovarian is that variety in which the germ is arrested in the pavilion (the tube adhering to the ovary).
The tubo-abdominal, in which the germ is arrested in the same place as the tubo-ovarian, but instead of the tube being adherent to the ovary, it is adherent to any of the neighboring viscera.
The tubai-proper is that form in which the germ is arrested in any part of the oviduct between the pavilion and that portion of the Fallopian tube that is surrounded by the uterine walls.
The tubo-uterine, or interstitial variety,